Weather · Philadelphia, United States
Philadelphia Weather in September
September in Philadelphia averages 30°C by day and 19°C at night, with about 67mm of rain. That makes it one of the best months to visit.
Avg high
30°C
86°F
Avg low
19°C
66°F
Rainfall
67mm
#11 wettest of 12
What to pack
Light, breathable clothes and strong sun protection. Rain is unlikely to interrupt your plans.
Timing a trip around the weather? A Local Friend in Philadelphia builds it around the season for you.