Philadelphia Weather in September
United States · 30-year monthly averages
👍 Good time to visit
September in Philadelphia is warm, with average daytime highs around 26°C (79°F) and nighttime lows near 16°C (61°F). Expect roughly 112mm of precipitation spread over about 8 rainy days, and this is one of the wetter months.
Avg high
26°C
79°F
Avg low
16°C
61°F
Rainfall
112mm
rainy
Rainy days
8
days with ≥1mm
🎒 What to pack
- light summer clothing
- sunscreen and sunglasses
- compact umbrella or rain jacket
September vs the rest of the year
FAQ
- How hot is Philadelphia in September?
- September in Philadelphia is warm, with average daytime highs around 26°C (79°F) and nighttime lows near 16°C (61°F). Expect roughly 112mm of precipitation spread over about 8 rainy days, and this is one of the wetter months.
- Does it rain a lot in Philadelphia in September?
- Philadelphia sees around 112mm of precipitation in September on average — rainy by global standards.
- Is September a good time to visit Philadelphia?
- September is a good month to visit Philadelphia, with generally agreeable conditions.