Pittsburgh weather in September 2025

Expect 75°F daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Pittsburgh in September. Check more long-term weather averages for Pittsburgh in September before you book your next holiday to Pennsylvania in 2025/2026.

  • 75°F maximum daytime temperature in September in Pittsburgh75
    75°F max day temperature
  • 6 hours of sunshine per day
  • 10 days with some rainfall in September in Pittsburgh10
    10 days with some rainfall
  • 54°F minimum night-time temperature in September in Pittsburgh54
    54°F min night temperature
  • 12 hours of daylight per day in September in Pittsburgh12
    12 hours of daylight per day
  • No heat & humidity in September in Pittsburgh0
    No heat & humidity
  • 3.2 inches monthly rainfall in September in Pittsburgh3.2
    3.2 inches of monthly rainfall
  • UV (maximum) index 6 (High) in September in Pittsburgh6
    6 (High) UV index

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The September weather guide for Pennsylvania (Pittsburgh) 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.

Metric (°C)  |  Imperial (°F)

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More about the USA

How hot is it in Pittsburgh in September?

Daytime temperatures usually reach 75°F in Pittsburgh in September, falling to 54°F at night.

How sunny is it in Pittsburgh in September?

There are normally 6 hours of bright sunshine each day in Pittsburgh in September - that's 52% of daylight hours.

Does it rain in Pittsburgh in September?

There are usually 10 days with some rain in Pittsburgh in September and the average monthly rainfall is 3.2 inches.

What is the chance of a hurricane in Pittsburgh in September?

On average less than 1 day in September in Pittsburgh is likely to be affected by the passage of one or more tropical storms.

Pittsburgh September sunrise & sunset times

Browse the sunrise and sunset times for Pittsburgh in September 2025. Select a month to view Pittsburgh sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:48 18:51
Monday, 15th September 2025 06:01 18:28
Tuesday, 30th September 2025 06:16 18:03

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