Last updated: February 24, 2025
August in Philadelphia brings warm temperatures, with maximum highs reaching 35°C (96°F) and an average of 25°C (77°F). Nights cool down to a pleasant 14°C (58°F), offering relief from daytime heat. The month is marked by notable precipitation, totaling 134 mm (5.3 in) over approximately 14 days, contributing to a relatively high humidity level of 72%. Whether basking in the sunshine or enjoying the occasional rainfall, August in Philadelphia is a dynamic blend of summer warmth and refreshing summer showers.
In August, Philadelphia experiences warm and vibrant weather, making it one of the hottest months of the year. With temperatures ranging from a comfortable 14°C (58°F) at night to a sizzling 35°C (96°F) during the day, residents and visitors alike relish in the summer heat, with an average temperature hovering around 25°C (77°F). This warm pattern follows a gradual increase from the cooler January days, peaking in July, and sets the stage for the transition to more moderate fall temperatures in September. With consistently high averages and peak daytime warmth, August embodies the essence of summer in the City of Brotherly Love, inviting outdoor activities and lively events before the cooler months draw near.
In August, Philadelphia experiences some of its highest precipitation levels of the year, with an impressive 134 mm (5.3 inches) accrued over 14 days of rainfall. This marks a slight increase from July, which also saw significant rain at 131 mm (5.2 inches) over 13 days. The trend of summer months showcasing elevated rainfall continues as May and June also recorded substantial totals. The consistent precipitation during this period suggests a shift in the weather patterns as the city transitions into late summer, often characterized by both heat and storms, ultimately setting the stage for the cooling temperatures of fall. Such a rainy August hints at the importance of water management and urban planning in the region.
In Philadelphia, the trend of humidity levels throughout the year showcases a noticeable ebb and flow. Starting off high in the winter months, January and February see humidity levels peaking at 84% and 83%, respectively. As spring arrives, there’s a slight dip, reaching a low of 78% in May, but the onset of summer brings a gradual decrease, culminating in August's humidity at 72%—the lowest point of the year. This decline continues until September, where humidity levels rise slightly to 75%. As autumn progresses, a marked increase in humidity returns, with November and December averaging 85% and 84%, respectively, reminding residents that humidity is a persistent character in Philadelphia's climate narrative.
In August, Philadelphia experiences a UV Index of 9, categorizing it as very high with a burn time of just 15 minutes. This reflects a slight decline from the peak UV levels seen in summer months, but sun safety remains crucial as exposure can still lead to significant skin damage in a short time. Comparatively, the UV Index has consistently been at 10 in the preceding months of June and July, showing a trend of high sun intensity throughout the summer. As the season begins to transition into September, when the UV Index decreases to 8, August sets the stage for an important reminder about sun protection. For more insights on UV trends, visit Philadelphia UV Index.
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In August, Philadelphia basks in the warm glow of 309 hours of sunshine, marking it as a vibrant summer month. As the peak of summer, August follows the sun-saturated month of July, which boasts the highest sunshine total of 346 hours. While slightly less radiant than its predecessor, August still enjoys a robust amount of sunlight, continuing the trend of long, bright days. This sunny disposition transitions into the cooler September, with sunshine diminishing to 264 hours, foreshadowing the gradual retreat of summer warmth. Overall, the data reveals a clear ascent in sunshine hours from winter's gloom in January through the summer months, offering Philadelphia residents plenty of opportunities to revel in outdoor activities under the sun.
In Philadelphia, the likelihood of sunny weather experiences a notable fluctuation throughout the year, peaking in March with a 55% chance of sunshine. As summer approaches, this probability begins to decline, dipping to 33% in August. This drop contrasts sharply with the more favorable forecasts of late summer and early fall, where September boasts a 52% chance of sunny days. Interestingly, while January and February start the year with 45% and 28% chances respectively, the overall trend suggests that as we move into the latter half of the year, sunshine becomes less predictable during August, hinting at the mix of summer storms and humidity that often characterizes this month in the City of Brotherly Love.
In August, Philadelphia experiences a slight decline in daylight hours, with approximately 13 hours of sunlight each day. This reduction marks a transition from the lengthy, sun-soaked days of mid-summer, where June and July boast 14 hours of daylight. As the summer winds down, the city begins to embrace shorter days, a trend that will continue as it moves into September, which sees 12 hours of daylight. This gradual shift from the peak of summer light foreshadows the impending autumn months, characterized by increasingly brisk days and a more subdued natural illumination. Overall, August serves as a bridge, balancing the lingering warmth of summer with the approaching coolness of fall.
In Philadelphia, the August winds tend to be the calmest of the year, averaging just 2.2 m/s (5 mph), which is a noticeable dip from the gusty start of the year. As summer peaks, these gentle breezes offer a soft contrast to the usually sweltering heat, creating a peaceful atmosphere as locals seek relief in parks and along the waterfront. The trend reveals a steady decrease in wind speed throughout the summer months, with July also reporting a low average of 2.3 m/s (5 mph), suggesting that the vibrant energy of spring has faded into a more still season. As August transitions into early fall, a slight uptick in wind speeds is anticipated, hinting at the shifting weather patterns that will soon follow.
The weather in Philadelphia changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of August's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Philadelphia and find detailed weather information for every month.
August and January present strikingly contrasting weather patterns. In August, temperatures range from a mild 14°C (58°F) at night to a sweltering 35°C (96°F) during the day, with an average of 25°C (77°F). The month experiences significant precipitation, averaging 134 mm (5.3 in) over approximately 14 days, accompanied by a humidity level of 72%. In stark contrast, January's temperatures plummet to a chilly minimum of -17°C (1°F), with an average of just 2°C (36°F) and a daytime high of 20°C (68°F). The winter month sees less rainfall, totaling 63 mm (2.5 in) over about 9 days, but the humidity is higher at 84%. For more detailed insights, you can check Philadelphia weather in January.
August and February present starkly contrasting weather patterns. In August, temperatures range from a minimum of 14°C (58°F) to a maximum of 35°C (96°F), with an average of 25°C (77°F) and humidity around 72%. Despite the warm temperatures, August also sees considerable rainfall, averaging 134 mm (5.3 in) over about 14 days. In contrast, February experiences much colder conditions, with temperatures ranging from a chilling -15°C (5°F) to a maximum of 26°C (78°F), averaging only 4°C (39°F). The month features slightly less precipitation, totaling 108 mm (4.3 in) over 11 days, but with a higher humidity level of 83%. For more details on February weather, you can visit Philadelphia weather in February.
In August, temperatures are significantly warmer, with averages around 25°C (77°F) and highs reaching up to 35°C (96°F), while March experiences much cooler conditions, with an average temperature of 7°C (44°F) and a maximum of 28°C (83°F). Precipitation is more frequent in August, occurring over 14 days with a total of 134 mm (5.3 in), compared to March, which sees precipitation on 10 days and totals 107 mm (4.2 in). Additionally, humidity levels are generally lower in August at 72%, while March has a higher humidity of 83%, making it feel cooler despite the mild temperatures. For a detailed look at March weather patterns, visit Philadelphia weather in March.
When comparing the weather in August and April, it is evident that August tends to be much warmer and more humid. In August, temperatures range from a minimum of 14°C (58°F) to a maximum of 35°C (96°F), with an average temperature of 25°C (77°F) and a humidity level of 72%. In contrast, April experiences cooler conditions, with temperatures varying from a chilly -2°C (29°F) to a warmer 32°C (89°F), averaging 12°C (55°F). Moreover, April has slightly less precipitation at 105 mm (4.1 in) over 11 days, compared to August's 134 mm (5.3 in) over 14 days. For a more detailed look at the weather patterns, you can visit Philadelphia weather in April.
The weather in August is notably warmer than in May, with average temperatures reaching 25°C (77°F) compared to May's 18°C (65°F). Both months experience similar maximum temperatures, peaking at 35°C (95°F) in May and 35°C (96°F) in August. Precipitation levels are quite close, with August receiving 134 mm (5.3 in) and May slightly lower at 133 mm (5.2 in), both spanning approximately 14 rainy days. However, August’s humidity at 72% is less than May’s 78%, contributing to a generally drier and warmer feel in the later month. For more detailed insights, check out Philadelphia weather in May.
In comparing the weather of August and June, August tends to be slightly warmer on average, with temperatures ranging from a minimum of 14°C (58°F) to a maximum of 35°C (96°F). In contrast, June features cooler temperatures, with a minimum of 10°C (50°F) and a maximum of 36°C (98°F). When it comes to precipitation, August is wetter, receiving 134 mm (5.3 in) over 14 days, compared to June's 102 mm (4.0 in) over 11 days. Humidity levels are also high in both months, but August averages 72%, while June is slightly more humid at 79%. For a closer look at June's weather specifics, you can check Philadelphia weather in June.
In comparison to July, August experiences slightly cooler average temperatures, with a minimum of 14°C (58°F) and a maximum of 35°C (96°F), while July sees a higher average of 26°C (79°F) and a peak of 37°C (99°F). Precipitation levels are similar, with August receiving 134 mm (5.3 in) over 14 days, just a tad higher than July's 131 mm (5.2 in) across 13 days. Humidity remains relatively consistent, with August at 72% and July slightly higher at 74%. For more detailed insights on July, you can check out Philadelphia weather in July.
The weather in August tends to be warmer, with average temperatures reaching 25°C (77°F) and maximum highs of 35°C (96°F), contrasted with September's cooler average of 22°C (71°F) and minimum temperatures dropping to 6°C (44°F). While both months can occasionally peak at 35°C, August typically experiences a higher level of precipitation at 134 mm (5.3 in) over 14 days, compared to September's 93 mm (3.7 in) over 10 days. Humidity remains relatively high in both months, with August at 72% and September slightly higher at 75%. For more detailed information, check out Philadelphia weather in September.
August weather typically features a warmer climate, with average temperatures around 25°C (77°F) and maximums soaring up to 35°C (96°F). This month also experiences significant rainfall, averaging 134 mm (5.3 in) over about 14 days, accompanied by a humidity level of 72%. In contrast, October brings a notable drop in temperature, with averages around 16°C (61°F) and minima dipping to 2°C (37°F). While October has a lower total precipitation of 106 mm (4.2 in) spread over just 9 days, it experiences higher humidity at 81%. For more detailed information, check out Philadelphia weather in October.
In August, the weather is notably warmer, with average temperatures hovering around 25°C (77°F) and maximums reaching up to 35°C (96°F). The month experiences considerable humidity at 72% and a total of 134 mm (5.3 in) of precipitation over about 14 days. In contrast, November brings a dramatic shift, with much cooler temperatures averaging 8°C (47°F). The temperature can drop as low as -8°C (18°F), while the maximum remains at 25°C (77°F), highlighting the transition into colder months. November also sees lower precipitation at 83 mm (3.3 in) spread across 8 days, but humidity increases to 85%. For more detailed insights, check out Philadelphia weather in November.
August and December present stark contrasts in weather. In August, temperatures typically range from a minimum of 14°C (58°F) to a scorching maximum of 35°C (96°F), with an average of 25°C (77°F). This month also sees considerable precipitation, averaging 134 mm (5.3 in) over 14 days, accompanied by a humidity level of 72%. In contrast, December's temperatures drop significantly, with a minimum of -12°C (10°F), an average of 4°C (40°F), and a maximum of 19°C (67°F). While precipitation is slightly lower at 100 mm (4.0 in) over 10 days, the humidity rises to 84%. These differences highlight the dramatic shift from the warm, humid summer to the cold, wintry conditions of winter. For more detailed information, check out Philadelphia weather in December.
As August settles over Philadelphia, the city experiences a notable shift in weather that sets it apart from other months. With average temperatures peaking at a sweltering 35°C (96°F), the summer sun shines brightly, inviting residents to bask in outdoor activities. However, the humidity lingers at a high 72%, making the air feel heavier and prompting a welcomed dip in cool indoor spaces. Moreover, August is characterized by its sporadic rainfall, accumulating about 134 mm over 14 days, which serves to cool down the sweltering days. This combination of heat, humidity, and intermittent showers creates a unique tapestry of summer weather, defining the month as a time of vibrant, yet muggy, days. For a deeper understanding of how Philadelphia's weather unfolds throughout the year, explore the city's comprehensive climate profile at Philadelphia Climate.