Philadelphia
Pennsylvania, USA
Long-term weather forecast
Long-term weather forecast
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August weather forecast and Climate
Philadelphia, PA

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The George Washington statue in front of the Independence Hall in Philadelphia, Pennsylvania
The George Washington statue in front of the Independence Hall in Philadelphia, Pennsylvania
A slight reduction in the temperature to the range of 67.8°F (19.9°C) and 85.3°F (29.6°C) introduces the warm August weather to Philadelphia.
The sunshine hours per day are approximately eight and a half, making the days warm, very humid, and mildly wet. As the nights remain cool and tolerable, touring Philadelphia continues well into the night with the extended daylight hours. Rainfall is moderately low, collecting a low 3.5" (88.9mm) in precipitation from an average of eight rainfall days. Occasional rainfall allows pleasant tours of Philadelphia, with minimal interruptions.
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  • The average high temperature in August: 85.3°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (40.3°F).

  • The average low temperature in August: 67.9°F

The month with the highest average low temperature is July (69.2°F).
The coldest month (with the lowest average low temperature) is January (25.6°F).

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  • The average humidity in August: 70.4%

The month with the highest relative humidity is September (71.6%).
The month with the lowest relative humidity is April (60.4%).

  • The average rainfall in August: 3.5"

The wettest month (with the highest rainfall) is July (4.4").
The driest month (with the lowest rainfall) is February (2.7").

  • The average rainfall days in August: 8.4 days

The month with the highest number of rainy days is April (11.3 days).
The month with the lowest number of rainy days is August (8.4 days).

  • The average snowfall in August: 0"

The month with the highest snowfall is February (8.8").
Months with the lowest snowfall are May, June, July, August, September and October (0").

  • The average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (4.4 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

  • The average sea temperature in August: 75.9°F

The best month for swimming (with the highest average sea temperature) is August (75.9°F).
The coldest month (with the lowest average sea temperature) is February (39.9°F).

  • The average daylight in August: 14h

Months with the longest days are June and July (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9h).

  • The average sunshine in August: 8.4h

The month with most sunshine is June (Average sunshine: 9h).
The month with least sunshine is December (Average sunshine: 4.4h).

  • The average UV index in August: 8

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).

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