Last updated: February 24, 2025
In August, Philadelphia experiences a dynamic climate characterized by warm, inviting temperatures. With a maximum of 31°C (89°F) and an average of 21°C (70°F), the summer heats up, while nighttime lows can dip to a refreshing 7°C (44°F). However, this month also brings a fair share of precipitation, totaling 106 mm (4.2 in) across 14 days, contributing to the 67% humidity that envelops the city. This blend of warmth and moisture creates a unique atmosphere, perfect for exploring Philadelphia’s vibrant outdoor scene amidst occasional summer showers.
In August, Philadelphia experiences a warm embrace of summer, with temperatures typically ranging from a minimum of 7°C (44°F) to a maximum of 31°C (89°F). The average temperature hovers around a comfortable 21°C (70°F), marking it as one of the hottest months of the year. This month stands out with consistent warmth, following the July highs, yet offers a slight reprieve from the peak summer heat. As August progresses, the city's vibrant outdoor culture comes alive, with locals and visitors alike enjoying the warm evenings. This trend of rising temperatures not only highlights the peak of summer but also sets the stage for the gradual transition into the cooler autumn months that follow.
In August, Philadelphia experiences a transition into late summer, marked by 106 mm (4.2 in) of precipitation over 14 rainy days. This rainfall slightly diminishes compared to the previous month’s heavier 137 mm (5.4 in) in July, signaling a gradual shift in weather patterns. While June and July are typically wetter months, August maintains a robust level of rain that supports the lush greenery of the city, contributing to an average summer. As the city prepares for the cooler months ahead, these late-summer showers play a crucial role in the region’s ecological balance, bridging the gap between the sweltering heat and the impending autumnal chill.
In August, Philadelphia experiences a slight drop in humidity, averaging around 67%, which marks a continuation of the trend seen since the peak of summer. Following the more humid months of July and June, where levels hovered around 69% and 68% respectively, the city's humidity begins to taper off as it transitions into early fall. This gradual decrease is part of a larger annual pattern, starting from a muggy 93% in January and steadily moving downward to more tolerable levels by late summer. As schools prepare to reopen and temperatures remain warm, August's relative humidity provides a refreshing shift, paving the way for the more comfortable months ahead. The latter part of the year sees humidity levels rise again, but for now, residents can relish in the comparatively drier August air.
In August, Philadelphia continues the trend of high UV exposure, maintaining a UV Index of 9, which falls under the very high exposure category. This signifies that sun protection is essential during this month, with a burn time of just 15 minutes for unprotected skin. Notably, the UV Index has remained steady at this peak level since June, indicating that summer’s intense sunlight is at its height. As you enjoy outdoor activities, be sure to wear sunscreen and protective clothing to safeguard your skin. For more detailed insights on UV trends throughout the year, check out the comprehensive guide at Philadelphia UV Index.
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August in Philadelphia shines brightly, contributing an impressive 326 hours of sunshine to the summer tableau. Following the peak of July's 339 hours, August maintains a delightful warmth, marking a slight dip but still offering ample opportunity for outdoor enjoyment. This month is nestled snugly between the peak summer months and the gradual transition into fall, reflecting the city’s vibrant seasonal shift. As the sunshine gradually wanes into September's 281 hours, August serves as a glorious culmination of summer’s radiant energy, inviting residents and visitors alike to bask in its golden glow before the cooler days set in.
In Philadelphia, August typically brings a moderate chance of sunny weather, with the likelihood sitting at 42%. This increase in sunshine is a welcome shift from the cooler winter months and sets a vibrant tone for late summer. Following a peak in March at 46%, the chances trend downwards to 34% in July, before experiencing a refreshing uptick in August. This indicates that while summer may be nearing its end, there's still ample opportunity for outdoor activities under the warm sun, making August a delightful month for both locals and visitors alike. As autumn approaches, the fluctuations in sunny days highlight the city's natural transition, maintaining a balance between the warm summer feel and the crispness of fall.
In August, Philadelphia basks in approximately 13 hours of daylight, continuing the summer trend established in June and July. This peak of brightness marks a gradual decline as the city transitions towards autumn, with daylight decreasing steadily from the long, sun-filled days of June and July. As summer wanes, the daylight hours decrease, foreshadowing the shorter days of September and October, which dip back to 12 hours and 10 hours, respectively. This rhythm of daylight underscores the cyclical nature of seasons in Philadelphia, where each month brings a shift in available light, influencing both daily life and the vibrant outdoor culture of the city.
In August, Philadelphia experiences a gentle breeze with an average wind speed of 2.6 m/s (6 mph), mirroring the calmness felt in July. This steady airflow creates a pleasant atmosphere, ideal for summer strolls and outdoor activities. As the city transitions into autumn, wind speeds gradually increase, reaching 3.2 m/s (7 mph) in September, hinting at the changing seasons. Overall, the data reveals a trend of lower wind speeds in the summer months, with a gradual uptick as fall approaches, making August a time for tranquil skies and leisurely pursuits in the city.
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 starkly contrasting weather conditions. In August, temperatures range from a mild 7°C (44°F) to a warm 31°C (89°F), with an average of 21°C (70°F). This summer month experiences significant humidity at 67% and sees about 106 mm (4.2 inches) of precipitation over 14 days. In contrast, January brings frigid temperatures, with a minimum of -33°C (-27°F), an average of -6°C (22°F), and a maximum of only 14°C (58°F). The winter month also has high humidity at 93% but less rainfall, totaling 86 mm (3.4 inches) over 12 days. For more detailed information, visit Philadelphia weather in January.
The weather in August and February starkly contrasts across multiple dimensions. In August, temperatures range from a mild 7°C (44°F) at night to a warm max of 31°C (89°F) during the day, accompanied by considerable rainfall totaling 106 mm (4.2 in) over about 14 days, and a humidity level of 67%. In contrast, February brings frigid temperatures, with a minimum of -27°C (-16°F) and an average of -4°C (25°F), peaking at just 15°C (60°F). Although February experiences less precipitation at 84 mm (3.3 in) across 12 days, the humidity is notably higher at 93%. For more details on the winter conditions, you can check out Philadelphia weather in February.
The weather in August is characterized by milder temperatures, with a minimum of 7°C (44°F) and an average of 21°C (70°F), peaking at a warm maximum of 31°C (89°F). In contrast, March presents a much colder climate, featuring temperatures that range from a minimum of -22°C (-7°F) to an average of 0°C (32°F), reaching a maximum of 21°C (70°F). While August sees significant precipitation with 106 mm (4.2 in) over 14 days, March has slightly less rainfall at 88 mm (3.5 in) across 12 days, albeit accompanied by higher humidity levels of 86%. For a detailed look at what to expect, check out Philadelphia weather in March.
When comparing the weather in April and August, distinct differences emerge. April typically sees a broader range of temperatures, from a chilly minimum of -7°C (19°F) to a pleasant maximum of 30°C (86°F), averaging around 7°C (44°F). In contrast, August offers warmer conditions, with minimum temperatures at 7°C (44°F) and highs reaching 31°C (89°F), resulting in a more stable average of 21°C (70°F). Precipitation levels are relatively high in both months, with April seeing 130 mm (5.1 in) over 14 days and August slightly lower at 106 mm (4.2 in) for the same number of days. Humidity also plays a significant role, peaking at 82% in April compared to 67% in August. For a more detailed look at April's weather, visit Philadelphia weather in April.
In comparing the weather of August and May, we notice distinct differences in temperature and humidity. August features a minimum temperature of 7°C (44°F) and an average of 21°C (70°F), peaking at 31°C (89°F), while May starts off colder with a minimum of -2°C (29°F) but has a similar maximum of 32°C (90°F). Precipitation levels are comparable, with August receiving 106 mm (4.2 in) over 14 days and May having 104 mm (4.1 in) across 13 days. Interestingly, humidity is slightly lower in August at 67% compared to May’s higher level of 75%. For more detailed information, you can check Philadelphia weather in May.
When comparing the weather in August and June, we see some interesting similarities and differences. August tends to be warmer, with average temperatures around 21°C (70°F), peaking at 31°C (89°F), whereas June has a slightly lower average of 19°C (66°F) and a maximum of 32°C (90°F). Both months experience significant rainfall, with August receiving 106 mm (4.2 in) over 14 days and June almost mirroring this with 104 mm (4.1 in) across 13 days. Humidity levels are fairly comparable, as August has a humidity of 67% and June is at 68%. For more details, you can check out Philadelphia weather in June.
In comparing the weather conditions between July and August, July tends to be slightly warmer with average temperatures around 22°C (72°F) and maximums reaching up to 35°C (95°F). In contrast, August sees a dip in both minimum and maximum temperatures, with averages around 21°C (70°F) and a maximum of 31°C (89°F). While both months experience a similar number of rainy days, July has a higher total precipitation of 137 mm (5.4 in) compared to August's 106 mm (4.2 in). Humidity levels are also quite comparable, with July at 69% and August slightly lower at 67%. For a more detailed look at July weather, you can visit Philadelphia weather in July.
In comparing the weather between August and September, we see a notable shift in temperature and precipitation patterns. August boasts a mild average temperature of 21°C (70°F) with maximum highs reaching up to 31°C (89°F), while September cools down significantly with an average of 17°C (62°F), although it can still match August's high of 32°C (89°F). Precipitation decreases from 106 mm (4.2 in) across 14 days in August to 75 mm (3.0 in) over just 9 days in September, indicating drier conditions as summer transitions into fall. Additionally, humidity slightly increases from 67% in August to 72% in September, contributing to a different feel in the atmosphere. For more detailed insights into September's weather, you can check out Philadelphia weather in September.
August and October present quite different weather experiences. In August, temperatures typically range from a minimum of 7°C (44°F) to a maximum of 31°C (89°F), with an average of 21°C (70°F). This month sees around 106 mm of precipitation over 14 days, accompanied by a humidity level of 67%. In contrast, October brings cooler temperatures, with minimums dropping to -3°C (26°F) and maximums reaching 26°C (80°F), while the average temperature is around 11°C (52°F). Notably, October experiences increased precipitation of 160 mm over the same number of rainy days, but the humidity rises to 83%. For more detailed insights on October weather, check out Philadelphia weather in October.
In August, the weather features a warm average temperature of 21°C (70°F), with maximum highs reaching up to 31°C (89°F). However, the month also brings a fair amount of rainfall, totaling 106 mm (4.2 in) over 14 days, accompanied by a moderate humidity level of 67%. In contrast, November sees a significant drop in temperatures, with averages around 3°C (37°F) and a minimum of -15°C (6°F). The month experiences slightly higher precipitation at 119 mm (4.7 in), also over 14 days, but with increased humidity at 88%. These contrasting climates highlight the transition from the warmth of summer to the chill of late autumn. For more detailed insights, you can check Philadelphia weather in November.
August and December present strikingly contrasting weather conditions. In August, temperatures range from a mild 7°C (44°F) at night to a warm 31°C (89°F) during the day, with an average of 21°C (70°F). The humidity is relatively high at 67%, and the month experiences about 106 mm (4.2 in) of precipitation over 14 days. In sharp contrast, December brings much colder weather, with temperatures dropping to a minimum of -27°C (-17°F) and an average of -2°C (28°F). The maximum temperature is a mere 16°C (61°F), and the month is characterized by higher humidity at 89%, despite slightly lower total precipitation at 98 mm (3.8 in) across 13 days. For more details on December weather, you can visit Philadelphia weather in December.
As summer draws to a close in Philadelphia, August brings a blend of warmth and humidity, with temperatures often peaking and making it one of the hottest months of the year. The average temperature of 21°C (70°F) provides a comfortable reprieve during the cooler evenings, but the frequent dips in temperature can be surprising for those accustomed to higher summer warmth. August also sees increased precipitation, with 14 days experiencing rainfall, which adds an extra layer of humidity to the already muggy atmosphere, distinguishing it from the drier months preceding it. For those looking to explore further into the weather patterns, be sure to check out Philadelphia Climate for more insights!