Weather in Philadelphia in August
August in Philadelphia is mild with average temperatures around 24.1°C (75.4°F). Expect significant rainfall with 121mm across approximately 13 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
29.4°C
84.9°F
Low
18.8°C
65.8°F
Precipitation
121 mm
4.7 inches
~13 rainy days
Conditions
Humidity
74%
Comparison to Adjacent Months
August is 3.5°C warmer than September.