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 maximum daytime temperature in September in Pennsylvania (Philadelphia)25
    25°C max day temperature
  • 7 hours of sunshine per day
  • 8 days with some rainfall in September in Pennsylvania (Philadelphia)8
    8 days with some rainfall
  • 14°C minimum night-time temperature in September in Pennsylvania (Philadelphia)14
    14°C min night temperature
  • 12 hours of daylight per day in September in Pennsylvania (Philadelphia)12
    12 hours of daylight per day
  • No heat & humidity in September in Pennsylvania (Philadelphia)0
    No heat & humidity
  • 91 mm monthly rainfall in September in Pennsylvania (Philadelphia)91
    91 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Pennsylvania (Philadelphia)6
    6 (High) UV index

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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

Metric (°C / mm)  |  Imperial (°F / inches)

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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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