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Pennsylvania weather in September 2025
Expect 25°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Pennsylvania in September. Check more long-term weather averages for Pennsylvania in September before you book your next holiday to Pennsylvania in 2025/2026.
- 25°C max day temperature
25 - 7 hours of sunshine per day
- 8 days with some rainfall
8 - 14°C min night temperature
14 - 12 hours of daylight per day
12 - No heat & humidity
0 - 91 mm of monthly rainfall
91 - 6 (High) UV index
6
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Recommended for Pennsylvania
The September weather guide for Pennsylvania (Philadelphia) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Top Pennsylvania destinations
Below are average maximum temperatures at popular countries, regions and places in Pennsylvania in September. Select a holiday destination to see more weather parameters.
All Pennsylvania destinations
- Allentown
- Du Bois
- Erie
- Gettysburg
- Harrisburg
- Lancaster
- Lewisburg
- Ohiopyle
- Philadelphia
- Pittsburgh
- Stroudsburg
- Warren
- Wilkes-Barre
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Pennsylvania in September?
Daytime temperatures usually reach 25°C in Philadelphia, Pennsylvania in September with no heat and humidity, falling to 14°C at night.
How sunny is it in Pennsylvania in September?
There are normally 7 hours of bright sunshine each day in Philadelphia, Pennsylvania in September - that's 58% of daylight hours.
Does it rain in Pennsylvania in September?
There are usually 8 days with some rain in Philadelphia, Pennsylvania in September and the average monthly rainfall is 91mm.
What is the chance of a hurricane in Pennsylvania in September?
On average less than 1 day in September in Philadelphia, Pennsylvania is likely to be affected by the passage of one or more tropical storms.
Pennsylvania September sunrise & sunset times
Browse the sunrise and sunset times for Pennsylvania in September 2025. Select a month to view Pennsylvania sunrise and sunset times for the next 12 months. The Pennsylvania sunrise and sunset times shown below are for Philadelphia.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Monday, 1st September 2025 | 05:29 | 18:32 |
| Monday, 15th September 2025 | 05:42 | 18:09 |
| Tuesday, 30th September 2025 | 05:56 | 17:44 |
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