August Weather in Philadelphia, United States

Last updated: June 24, 2025

In Philadelphia, United States, the average temperature in August hovers around 26°C (78°F), offering a pleasant climate for outdoor activities. Expect minimum temperatures of 16°C (62°F) and highs reaching up to 35°C (95°F). This month also sees 119 mm (4.7 in) of precipitation spread over approximately 13 days, creating a lush environment. With an average humidity of 76%, the air feels warm and inviting, perfect for enjoying the vibrant atmosphere.

August Temperature in Philadelphia

In August in Philadelphia, the average temperature is 26°C (78°F), with maximums reaching up to 35°C (95°F) and minimums dipping as low as 16°C (62°F). This pleasant climate makes Philadelphia an ideal destination for travelers looking for comfortable weather to explore and enjoy outdoor activities.

August Weather in Philadelphia: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Philadelphia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Philadelphia, August typically has an average temperature of 26°C (78°F), with highs reaching up to 35°C (95°F) and lows dropping to around 16°C (62°F).

Data source: Temperature data for Philadelphia generated using information from the Copernicus Climate Change Service.

August Precipitation in Philadelphia

In Philadelphia in August, the precipitation amount is 119 mm (4.7 in) spread over 13 days.

August Precipitation Trends in Philadelphia

The chart displays monthly precipitation patterns in Philadelphia, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Philadelphia, August typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 13 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

August Humidity in Philadelphia

In Philadelphia in August humidity is 76%. With an average temperature of 26°C (78°F), this humidity feels like a warm, tropical embrace, making travel feel like a stroll through a steamy rainforest, where the air clings to your skin and every step can leave you drenched, yet there's a certain charm in the lush scenery and vibrant life all around.

August Average Humidity in Philadelphia

This chart illustrates the average monthly humidity levels in Philadelphia, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Philadelphia is approximately 76%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Philadelphia

In Philadelphia in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Philadelphia.

Maximum UV Index Levels in Philadelphia for August

The chart shows the monthly maximum UV Index (UVI) for Philadelphia in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Philadelphia typically reaches 10, which falls under the very high exposure category.

Data source: Philadelphia August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How August Weather in Philadelphia Compares to Other Months

Weather in Philadelphia varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Philadelphia, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Philadelphia, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (42°F)	99 mm (3.9 inches)	86%	moderate
February Weather	8°C (47°F)	176 mm (6.9 inches)	86%	high
March Weather	12°C (53°F)	160 mm (6.3 inches)	86%	very high
April Weather	15°C (60°F)	141 mm (5.5 inches)	82%	very high
May Weather	21°C (70°F)	113 mm (4.4 inches)	85%	extreme
June Weather	24°C (76°F)	107 mm (4.2 inches)	85%	extreme
July Weather	26°C (80°F)	111 mm (4.4 inches)	83%	extreme
August Weather	26°C (78°F)	119 mm (4.7 inches)	76%	very high
September Weather	24°C (75°F)	92 mm (3.6 inches)	76%	very high
October Weather	18°C (65°F)	118 mm (4.6 inches)	80%	high
November Weather	10°C (50°F)	79 mm (3.1 inches)	88%	moderate
December Weather	8°C (46°F)	137 mm (5.4 inches)	88%	moderate