September in Philadelphia usually marks a transition from summer time’s warmth to autumn’s cooler temperatures. Each day highs common within the low to mid-70s Fahrenheit (low 20s Celsius), whereas in a single day lows dip into the 50s Fahrenheit (low teenagers Celsius). This era typically experiences diminishing humidity, creating comfy situations. Rainfall quantities are typically reasonable, just like different months, and contribute to the town’s total yearly precipitation.
Understanding Philadelphia’s climatological shift on this month is essential for residents and guests alike. The temperate climate permits for continued enjoyment of outside actions, from exploring historic websites to partaking within the metropolis’s vibrant cultural scene. Packing layers is advisable to accommodate fluctuating each day temperatures. Traditionally, September has additionally been a key time for agricultural harvests within the area, reflecting its reasonable local weather and sufficient rainfall.
This info supplies a basis for additional exploration of particular matters associated to Philadelphia in September, reminiscent of beneficial apparel, seasonal occasions, and historic local weather knowledge. Extra detailed details about these areas shall be offered within the following sections.
1. Common excessive
A median excessive of 75F (24C) considerably influences Philadelphia’s September local weather. This temperature represents a snug departure from summer time’s peak warmth whereas remaining heat sufficient to help a wide range of outside actions. This reasonable temperature outcomes from the waning affect of summer time’s high-pressure techniques and the gradual onset of cooler air lots from the north. Consequently, days are typically nice, encouraging exploration of historic websites, parks, and outside markets. For instance, a typical September afternoon may enable for comfy sightseeing alongside the Benjamin Franklin Parkway or having fun with a picnic in Fairmount Park with out experiencing oppressive warmth. This common excessive temperature facilitates continued engagement with the town’s outside choices.
The 75F common excessive additionally performs a job in shaping the town’s cultural calendar throughout September. Out of doors festivals, concert events, and sporting occasions stay viable choices, contributing to the town’s vibrant autumnal ambiance. Native companies, reminiscent of eating places with outside seating, additionally profit from this nice climate. Moreover, this temperature typically avoids extremes that might negatively impression susceptible populations, such because the aged or these with respiratory situations. This facet underscores the sensible significance of understanding common temperatures for public well being and concrete planning.
In abstract, the 75F common excessive in Philadelphia throughout September represents a essential consider shaping the town’s local weather and related actions. This temperature facilitates a transition from summer time to autumn, offering comfy situations for residents and guests. Understanding this key facet of September’s climate permits for knowledgeable decision-making relating to outside actions, occasion planning, and public well being issues. Whereas variations in each day temperatures can happen, the typical excessive serves as a worthwhile benchmark for characterizing Philadelphia’s September local weather.
2. Common low
Philadelphia’s common low temperature of 55F (13C) in September is a defining attribute of the town’s early autumn local weather. This measure signifies cooler nights following typically nice days, influencing apparel selections and outside exercise planning. Understanding this common low, alongside the typical excessive, supplies a complete perspective on the town’s temperature fluctuations throughout this transitional month.
-
Night Consolation and Out of doors Actions
Whereas daytime temperatures encourage outside exploration, the 55F common low introduces a noticeable shift in night consolation. Out of doors occasions, eating, or walks might require gentle jackets or sweaters. This temperature vary expands the probabilities for experiencing Philadelphia’s cultural scene, permitting for each daytime and night actions. The comfy evenings additionally contribute to the attraction of open-air venues and prolonged outside eating seasons.
-
Transitional Sleep Situations
The 55F common low usually necessitates changes in sleeping preparations. Open home windows frequent throughout summer time months may turn into much less fascinating, and lighter bedding may have alternative with hotter choices. This transition displays the shift in direction of cooler autumnal situations and the lowering want for energetic cooling measures. Residents and guests typically discover this temperature vary conducive to comfy sleep.
-
Influence on Power Consumption
The lowering temperatures, as indicated by the typical low, typically correlate with lowered air con utilization. This shift contributes to decrease power consumption for each households and companies. The decrease power demand displays the transition in direction of cooler climate and the lowering reliance on energetic cooling techniques.
-
Implications for Agriculture and Horticulture
The 55F common low, coupled with daytime temperatures, influences the late-season development of sure crops and vegetation within the Philadelphia area. This temperature vary can speed up the maturation of autumnal crops and sign the onset of dormancy for some plant species. The timing of the primary frost, which may happen later within the fall, is a essential issue for native agriculture and horticulture.
In abstract, the 55F common low temperature in Philadelphia throughout September performs a vital position in shaping the town’s local weather and influencing numerous points of each day life, from outside actions to power consumption. Understanding this common low, at the side of different climatological components, supplies a complete understanding of Philadelphia’s climate in September.
3. Reducing humidity
Reducing humidity is a defining attribute of September’s climate in Philadelphia, marking a major shift from the customarily oppressive humidity of summer time. This lower outcomes from the transition to cooler air lots originating from the north, which typically carry much less moisture than the hotter, southerly air prevalent throughout summer time. Decrease humidity contributes considerably to the notion of comfy temperatures, even on days when the thermometer reads comparatively excessive. For instance, a temperature of 75F (24C) in September feels noticeably extra nice than the identical temperature in July or August as a result of lowered moisture content material within the air. This contributes to the general agreeable local weather that characterizes early autumn in Philadelphia.
The decreased humidity additionally influences numerous points of each day life. Bodily exertion turns into extra comfy, making outside actions reminiscent of operating, biking, and strolling extra satisfying. Decreased humidity additionally lessens the chance of heat-related diseases, contributing to public well being and security. Moreover, decrease humidity ranges can alleviate respiratory discomfort for people delicate to excessive moisture content material within the air. From a sensible perspective, decreased humidity typically interprets to lowered reliance on air con, doubtlessly decreasing power consumption and related prices. Moreover, decrease humidity ranges can impression hair and pores and skin, typically making them really feel much less sticky or oily in comparison with the summer time months.
In abstract, the lowering humidity in Philadelphia throughout September performs a vital position in establishing the comfy situations related to early autumn. This lower not solely moderates the notion of temperature but additionally influences numerous points of each day life, from outside actions to private consolation and power consumption. Understanding the position of humidity in shaping Philadelphia’s September local weather supplies worthwhile context for residents and guests alike, enabling more practical planning and enhanced enjoyment of the season.
4. Reasonable rainfall
Reasonable rainfall is a attribute function of Philadelphia’s September local weather, contributing considerably to the town’s annual precipitation complete and influencing numerous ecological processes. Whereas September is just not usually the wettest month, it receives a comparable quantity of rainfall to different months all year long. This rainfall performs a vital position in sustaining city inexperienced areas, together with parks, gardens, and road timber, which contribute to the town’s aesthetic attraction and environmental well being. The reasonable rainfall additionally helps to replenish groundwater provides and preserve soil moisture ranges, supporting the area’s numerous flora. Moreover, rainfall in September can affect native agricultural practices, affecting late-season harvests and preparations for fall planting.
The impression of reasonable rainfall extends past ecological issues. Occasional wet days in September necessitate changes to outside plans, influencing selections in apparel and actions. Umbrellas turn into important equipment, and indoor points of interest, reminiscent of museums and historic websites, achieve elevated attraction. Rainfall can even impression transportation, doubtlessly resulting in slower commutes and elevated reliance on public transit. Whereas heavy downpours are much less frequent in September in comparison with summer time thunderstorms, they’ll nonetheless happen, often resulting in localized flooding and disruptions to each day routines. Understanding the chance and potential impression of rainfall is important for efficient planning and navigation of the town throughout September.
In abstract, reasonable rainfall is an integral element of Philadelphia’s September climate, taking part in an important position in sustaining ecological stability and influencing numerous points of city life. Whereas not usually extreme, September rainfall necessitates sensible issues for each residents and guests. Balancing outside actions with indoor alternate options, being ready for infrequent showers, and understanding the potential impression on transportation are key components in navigating Philadelphia’s September local weather. Recognizing the position and implications of reasonable rainfall contributes to a complete understanding of the town’s climate patterns and facilitates knowledgeable decision-making throughout this transitional month.
5. Transitional Season
September in Philadelphia signifies a transitional season, bridging the hole between summer time’s heat and autumn’s coolness. This transitional interval displays dynamic climate patterns, influencing apparel selections, outside actions, and the general city ambiance. Understanding this transition supplies worthwhile context for navigating the town throughout September.
-
Temperature Fluctuations
Each day temperatures in September can fluctuate considerably. Heat, sunny days paying homage to summer time can transition quickly into cool, crisp evenings attribute of autumn. This variability necessitates adaptable clothes selections, typically requiring layers to accommodate each heat afternoons and cooler nights. Temperature swings can even affect the scheduling of outside actions, with hotter durations favoring strenuous actions and cooler occasions fitted to extra leisurely pursuits.
-
Shifting Foliage
September marks the start of autumn’s vibrant foliage show. Whereas the height of fall colours usually happens later in October or November, early indicators of change turn into evident in September. Leaves start to transition from inexperienced to shades of yellow, orange, and crimson, including a definite visible aspect to the city panorama. This gradual transformation displays the altering season and contributes to Philadelphia’s autumnal attraction.
-
Assorted Precipitation Patterns
September’s rainfall patterns mirror the transitional nature of the season. Whereas summer time’s frequent thunderstorms turn into much less frequent, durations of regular rain can happen. This variability requires preparedness for each dry and moist situations. Umbrellas and rain jackets turn into important objects for navigating the town throughout September. Rainfall additionally contributes to the altering panorama, influencing foliage shade and selling the expansion of autumnal vegetation.
-
Cultural and Social Diversifications
Philadelphia’s cultural calendar adapts to the transitional season. Out of doors festivals and occasions proceed, typically incorporating autumnal themes. Eating places and cafes might provide seasonal menus that includes fall substances. The town’s social ambiance additionally shifts, reflecting the transition from summer time’s carefree power to autumn’s extra introspective temper. This adaptation to the altering season is a defining attribute of city life in Philadelphia throughout September.
These sides of a transitional season contribute to the distinctive character of Philadelphia’s climate in September. Understanding these components permits residents and guests to understand the dynamic nature of this era and to interact with the town accordingly. The interaction of fluctuating temperatures, altering foliage, different precipitation, and cultural diversifications shapes the general expertise of September in Philadelphia, highlighting the importance of recognizing this month as a transitional season.
6. Early Fall Foliage
Early fall foliage in Philadelphia is intrinsically linked to September’s climate patterns. Temperature, daylight, and rainfall throughout late summer time and early autumn instantly affect the onset and vibrancy of fall colours. Analyzing the connection between these components supplies perception into the event of this attribute seasonal show.
-
Temperature’s Function
Reducing temperatures, notably cooler nighttime lows, sign deciduous timber to start getting ready for winter dormancy. This course of initiates the breakdown of chlorophyll, the inexperienced pigment accountable for photosynthesis. As chlorophyll diminishes, different pigments current within the leaves, reminiscent of carotenoids (yellows and oranges) and anthocyanins (reds and purples), turn into extra seen. Philadelphia’s common September temperatures facilitate this transition, initiating the early levels of fall foliage growth. A very cool September can speed up the colour change, whereas a hotter September may delay the onset of vibrant hues. This demonstrates the direct hyperlink between temperature and the timing of fall foliage.
-
Daylight’s Affect
Shorter days and lowered daylight publicity additional contribute to the decline of chlorophyll manufacturing. Much less daylight means much less photosynthesis, accelerating the transition in direction of fall colours. The lowering daylight attribute of September in Philadelphia contribute to this course of. Areas with extra direct daylight publicity may expertise barely delayed shade adjustments in comparison with shadier places. This highlights the nuanced interaction between daylight and foliage growth inside the city surroundings.
-
Rainfall’s Influence
Sufficient rainfall throughout late summer time and early autumn is important for sustaining tree well being and supporting vibrant foliage. Adequate moisture ranges assist maintain the metabolic processes concerned in pigment manufacturing. Conversely, drought situations can stress timber, doubtlessly resulting in untimely leaf drop and muted fall colours. Philadelphia’s typical reasonable rainfall in September typically supplies enough moisture for wholesome foliage growth. Nevertheless, durations of prolonged drought can negatively impression the vibrancy of the show, underscoring the significance of rainfall for optimum fall foliage.
-
Species-Particular Variations
Completely different tree species exhibit various responses to those environmental cues, leading to a various tapestry of fall colours. Some species, reminiscent of maples, are recognized for his or her vibrant reds and oranges, whereas others, like oaks, may show extra subdued yellows and browns. Philadelphia’s numerous city forest, that includes a wide range of tree species, contributes to the richness and complexity of the autumn foliage show. Observing these species-specific variations supplies additional perception into the interaction between genetics and environmental components in shaping fall foliage growth.
In abstract, the emergence of early fall foliage in Philadelphia throughout September is a direct consequence of the town’s particular climate patterns. The interaction of lowering temperatures, lowered daylight, and reasonable rainfall influences the timing and vibrancy of the colour change. Understanding these relationships supplies a deeper appreciation for the dynamic interaction between climate and the pure world inside an city surroundings. This connection additional enhances the expertise of autumn in Philadelphia, highlighting the importance of September as a transitional season.
7. Out of doors actions viable
The viability of outside actions in Philadelphia throughout September stems instantly from the prevailing climate situations. Common excessive temperatures within the low to mid-70s Fahrenheit (low 20s Celsius), coupled with lowering humidity, create a snug surroundings for a variety of pursuits. Cooler evenings, averaging within the mid-50s Fahrenheit (low teenagers Celsius), necessitate gentle jackets or sweaters however typically don’t preclude outside engagement. This mix of things distinguishes September as a very interesting time for experiencing Philadelphia’s outside choices, from historic parks to bustling road festivals.
A number of examples illustrate this connection. Lengthy walks or bike rides alongside the Schuylkill River Path turn into extra satisfying with out the oppressive warmth and humidity of summer time. Picnics in Fairmount Park or Rittenhouse Sq. provide nice daytime experiences. Out of doors concert events and festivals, such because the FringeArts Competition, typically scheduled in September, capitalize on the favorable climate. Visiting historic websites like Independence Nationwide Historic Park turns into extra comfy, permitting for prolonged exploration. These examples reveal how September’s climate instantly facilitates and enhances the enjoyment of outside actions.
Understanding this relationship between climate and outside exercise viability holds important sensible implications. For residents, it permits for knowledgeable planning of weekend excursions and night engagements. For vacationers, it guides packing selections and exercise choice, maximizing their expertise of the town. Native companies, notably these with outside elements, profit from elevated patronage. Moreover, the prevalence of outside actions promotes bodily exercise and group engagement, contributing to total well-being. Recognizing the position of climate in facilitating outside pursuits is important for appreciating and maximizing the alternatives offered by Philadelphia’s September local weather.
8. Nice Evenings
Nice evenings are a trademark of September in Philadelphia, distinguishing the month from the customarily stifling summer time nights and foreshadowing the cooler temperatures of autumn. This attribute contributes considerably to the town’s attraction throughout September, extending the potential for outside actions and enhancing the general expertise for residents and guests. Understanding the components contributing to those nice evenings supplies worthwhile context for appreciating this facet of Philadelphia’s September local weather.
-
Snug Temperatures
Night temperatures in Philadelphia throughout September usually fall into the 50s and 60s Fahrenheit (low teenagers to excessive teenagers Celsius). This vary supplies a snug surroundings for outside eating, strolling by way of metropolis streets, or attending night occasions. The absence of maximum warmth permits for prolonged enjoyment of outside areas with out discomfort. For instance, open-air performances, night concert events in parks, and outside eating on restaurant patios turn into extra interesting throughout this time.
-
Decreased Humidity
The lower in humidity, attribute of September in Philadelphia, contributes considerably to the pleasantness of evenings. Decrease humidity ranges make the air really feel lighter and fewer oppressive, enhancing consolation even on days with comparatively excessive temperatures. This lowered humidity additionally minimizes the notion of stuffiness, permitting for extra comfy sleep and decreasing reliance on air con through the night hours. This contributes to a extra refreshing and satisfying outside expertise.
-
Prolonged Out of doors Alternatives
Nice evenings in September lengthen the alternatives for outside actions. Residents and guests can comfortably get pleasure from night walks, bike rides, or picnics. Out of doors sporting occasions and festivals turn into extra interesting throughout this time. Eating places and bars with outside seating expertise elevated patronage. This extension of outside exercise hours into the night enhances the vibrancy of metropolis life and contributes to the general attraction of September in Philadelphia. It additionally permits for a greater diversity of actions, catering to numerous pursuits and preferences.
-
Transitional Environment
The nice evenings of September contribute to a novel transitional ambiance in Philadelphia. The lingering heat of summer time combines with the rising crispness of autumn, creating a definite ambiance. This transitional interval provides a way of change and anticipation for the upcoming fall season. The comfy evenings enable residents and guests to completely respect this transition, experiencing each the residual heat of summer time and the anticipation of autumn’s arrival. This transitional ambiance additional distinguishes September as a particular time in Philadelphia.
In abstract, nice evenings are a defining attribute of September’s climate in Philadelphia. The confluence of comfy temperatures, decreased humidity, and prolonged outside alternatives creates a novel and interesting ambiance. This contributes considerably to the town’s vibrancy throughout this transitional month and provides a definite expertise for each residents and guests. Appreciating the components contributing to those nice evenings enhances the general enjoyment of September in Philadelphia.
9. Occasional Summer time Warmth
Whereas September in Philadelphia typically marks a transition to cooler temperatures, occasional durations of summer-like warmth can nonetheless happen. These intermittent warmth waves, although much less frequent and intense than these skilled in July and August, are an essential consideration when understanding the total spectrum of climate potentialities throughout this transitional month. Their presence necessitates flexibility in planning outside actions and highlights the significance of remaining adaptable to fluctuating situations. The next sides discover this phenomenon additional.
-
Lingering Summer time Patterns
Occasional summer time warmth in September outcomes from the lingering affect of summer time climate patterns. Excessive-pressure techniques, attribute of summer time, can periodically reassert themselves, bringing hotter air lots and elevated humidity. These durations can final for a number of days, quickly interrupting the transition to cooler autumnal climate. For instance, a string of days with temperatures within the 80s and even low 90s Fahrenheit (excessive 20s to low 30s Celsius) can happen in early to mid-September. This underscores the dynamic nature of climate patterns throughout this transitional month and the potential for surprising temperature fluctuations.
-
Influence on Out of doors Actions
Intervals of summer time warmth can considerably impression outside actions deliberate for September. Strenuous bodily exertion throughout these hotter durations might require changes, reminiscent of scheduling for cooler components of the day or incorporating extra frequent breaks. Hydration turns into notably essential throughout these warmth waves. Out of doors occasions may necessitate contingency plans for shade or cooling stations. Understanding the potential for infrequent summer time warmth permits for more practical planning and adaptation, guaranteeing the protection and delight of outside pursuits.
-
Transitional Challenges
The occasional resurgence of summer time warmth throughout September presents distinctive challenges for residents and guests. Wardrobe selections should accommodate each cooler autumnal temperatures and the potential for surprising heat. Air con, usually phased out as autumn approaches, may require non permanent reactivation. These challenges spotlight the transitional nature of September’s climate and the necessity for flexibility in adapting to fluctuating situations. Recognizing the potential for these variations permits for more practical preparation and minimizes disruptions to each day routines.
-
Distinguishing September’s Local weather
Whereas occasional summer time warmth can quickly interrupt the transition to autumn, it additionally contributes to the distinctive character of Philadelphia’s September local weather. This variability distinguishes September from each the constant warmth of summer time and the constant cool of autumn. The potential for each heat and funky days inside the identical month provides complexity to the climate patterns and supplies a novel expertise of seasonal transition. This dynamic nature highlights the significance of understanding the total vary of climate potentialities when planning actions or visiting Philadelphia in September.
In abstract, the incidence of occasional summer time warmth in Philadelphia throughout September provides an essential layer of complexity to the town’s climate patterns. Understanding this potential for fluctuating temperatures, recognizing its impression on outside actions, and appreciating the transitional challenges it presents are essential for navigating this month successfully. These occasional warmth waves, whereas a departure from the overall development towards cooler climate, contribute to the distinctive character of Philadelphia’s September local weather.
Continuously Requested Questions
This part addresses frequent inquiries relating to Philadelphia’s climate in September, offering concise and informative responses.
Query 1: What’s the common temperature in Philadelphia throughout September?
Common excessive temperatures usually vary from the low to mid-70s Fahrenheit (low 20s Celsius), whereas common lows fall into the 50s Fahrenheit (low teenagers Celsius).
Query 2: How a lot rain does Philadelphia usually obtain in September?
Rainfall in September is usually reasonable, corresponding to different months, contributing to the town’s total yearly precipitation. Particular quantities can fluctuate yearly.
Query 3: Is humidity a major consider Philadelphia’s September climate?
Humidity ranges usually lower in September in comparison with the summer time months, contributing to extra comfy situations.
Query 4: What kind of clothes is beneficial for visiting Philadelphia in September?
Layering is beneficial to accommodate fluctuating temperatures. Gentle jackets or sweaters are advisable for cooler evenings, whereas short-sleeved apparel is appropriate for hotter daytime durations.
Query 5: Are outside actions possible in Philadelphia throughout September?
September’s reasonable temperatures and lowering humidity typically help a variety of outside actions. Occasional rain and fluctuating temperatures needs to be thought-about when planning.
Query 6: Does Philadelphia expertise any important climate occasions throughout September?
Whereas much less frequent than in summer time, occasional warmth waves and heavy rainfall occasions can happen. Monitoring forecasts is advisable for correct and up-to-date info.
Understanding these frequent points of Philadelphia’s September climate permits for knowledgeable planning and enhanced enjoyment of the town throughout this transitional month.
The next sections will present additional particulars relating to particular points of Philadelphia’s local weather and seasonal occasions in September.
Suggestions for Navigating Philadelphia’s September Climate
Efficient preparation enhances customer experiences and permits residents to completely benefit from the distinctive traits of Philadelphia’s September local weather. The next ideas present sensible steerage for navigating this transitional month.
Tip 1: Pack Layers: September’s fluctuating temperatures necessitate adaptable clothes. Gentle jackets, sweaters, and long-sleeved shirts present heat throughout cooler evenings, whereas short-sleeved apparel stays appropriate for hotter daytime durations. This strategy ensures consolation no matter temperature variations.
Tip 2: Monitor Forecasts: Climate patterns in September can shift quickly. Consulting dependable climate forecasts earlier than and through visits permits for changes to deliberate actions and acceptable apparel choice. This proactive strategy minimizes disruptions as a result of surprising climate adjustments.
Tip 3: Embrace Indoor Choices: Whereas September typically provides nice climate, occasional rain is feasible. Incorporating indoor actions, reminiscent of visits to museums, historic websites, or efficiency venues, supplies alternate options for wet days and diversifies experiences. Philadelphia provides a wealth of indoor points of interest to discover.
Tip 4: Make the most of Public Transportation: Navigating the town through public transportation may be advantageous throughout September. This strategy avoids parking challenges, notably throughout occasions, and permits for environment friendly journey between numerous locations. Philadelphia’s public transportation system supplies complete protection all through the town.
Tip 5: Plan for Early Fall Foliage: September marks the start of the autumn foliage season. Incorporating visits to parks and gardens into itineraries permits one to witness the early levels of shade transformation. This provides a novel seasonal dimension to the Philadelphia expertise.
Tip 6: Take into account Occasion Schedules: Quite a few outside festivals, concert events, and occasions typically happen in September. Checking occasion schedules and planning accordingly can enrich experiences and supply alternatives to interact with the town’s vibrant cultural scene. These occasions typically capitalize on September’s nice climate.
Tip 7: Keep Hydrated: Even throughout cooler durations, sustaining sufficient hydration stays essential. Carrying a water bottle and refilling it all through the day helps total well-being and ensures optimum enjoyment of actions. That is notably essential during times of residual summer time warmth.
These preparatory measures contribute considerably to a constructive and knowledgeable engagement with Philadelphia throughout September. Adaptability, consciousness of potential climate variations, and strategic planning maximize enjoyment of the town’s choices throughout this dynamic transitional month.
The next conclusion synthesizes the important thing points of Philadelphia’s September climate and reinforces the advantages of understanding its distinctive traits.
Climate in Philly in September
Philadelphia’s September climate presents a dynamic transitional interval between summer time and autumn. Common temperatures, usually within the 70s Fahrenheit (low 20s Celsius) for highs and 50s Fahrenheit (low teenagers Celsius) for lows, provide comfy situations for a wide range of actions. Reducing humidity additional enhances outside consolation. Whereas reasonable rainfall is typical, occasional summer time warmth and heavier precipitation occasions stay potential. This variability underscores the significance of understanding the total spectrum of climate potentialities.
Consciousness of those climatological nuances permits for efficient planning and enhanced engagement with Philadelphia’s numerous choices. Adaptable apparel, knowledgeable decision-making relating to outside actions, and consideration of indoor alternate options contribute to a constructive expertise. Finally, appreciation of Philadelphia’s distinctive September local weather unlocks the total potential of this transitional month.
