Weather in Philadelphia in August
August in Philadelphia is warm outdoor weather. Days are long enough to be useful. Shade starts to matter at midday.
In United States, this is how Philadelphia actually wears August, not how a country centroid would. Compared with July and January, August sits in the middle of Philadelphia's year.
- Average temp
- 25°C
20–30°C
- Rainfall
- 109 mm
Showers likely
- Sunshine
- 9.2 h
hours per day
- Wind
- 13 km/h
What to expect
Daytime
Warm days in Philadelphia in August. A hat starts to earn its keep at midday. Evenings are the comfortable part of the clock.
You can walk at more hours than in the fierce months. Still build in a pause when the sun is high. Nights are easy.
Rain
August is the wet side of the year in Philadelphia. Days can be heavy. Plans that cannot survive rain are the wrong plans.
This is not a reason to skip Philadelphia if you like the place. It is a reason to pack for weather and to stop treating every grey hour as a failed holiday.
Evening
Evenings stay warm.
What to pack
Sun protection
Rain jacket
Where to stay in Philadelphia
Dates are a starting point for August.
Travel guides for Philadelphia
What to read before you book.
Average weather in Philadelphia
TemperatureRainfall
Similar weather in August
Other destinations whose August averages sit close to this one.
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FAQs about Philadelphia
Climate averages for Philadelphia, 1991–2020.
The best time to visit Philadelphia is between May and October, the most comfortable stretch of the year on these averages.
July is the hottest month, with an average around 26°C.
September is the wettest month, with about 112 mm of rain.
No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.
