Philadelphia weather in August
Long-run climate averages for Philadelphia, PA in August, plus what the forecast models say for the days ahead.
In August, Philadelphia averages 85°F by day and 67°F at night. The wettest month is usually April.
August in Philadelphia averages a daytime high of 85°F and an overnight low of 67°F, which reads as hot for this part of the world. It is among the three warmest months of the year here. Across the whole year Philadelphia sees roughly 46 inches of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like - for that, see the live Philadelphia forecast with every model compared and how much they currently agree.
Philadelphia weather by month
what to expect in Philadelphia through the yearHere is Philadelphia's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to Philadelphia by season.
Bottom line: over the last 30 days the European model has been the most accurate forecast for Philadelphia, scoring 97/100 on our CheckWeather Score, ahead of the American at 67. See the full US accuracy scoreboard for exactly how every model is tested.
Common questions
How warm is Philadelphia in August?
Is August a good time to visit Philadelphia?
Does it rain a lot in Philadelphia in August?
Climate averages from ERA5 reanalysis. Model accuracy re-scored over a rolling 30 days. Page updated .