‹ Philadelphia weather by month
Typical September weather
Philadelphia
Pennsylvania · September
79° days
61° nights
about 6 rainy days · 12½ hours of daylight
What to pack
- Sunscreen
What September feels like
Warm days, cool nights, and the Eagles home opener turning the whole city a shade of green. The heat lets go around the middle of the month and the outdoor tables get their finest three weeks.
Expect about 6 days with real rain — enough to notice, not enough to plan around. Humidity stays comfortable; the air never feels heavy.
The numbers
| Typical high | 79° |
|---|---|
| Typical low | 61° |
| Days with real rain | 6 |
| Total rain | 4.4 in |
| Humidity | comfortable |
| Sunrise / sunset (mid-month) | 6:41 am / 7:09 pm |