Harrisburg weather in September 2025

Expect 24°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Harrisburg in September. Check more long-term weather averages for Harrisburg in September before you book your next holiday to Pennsylvania in 2025/2026.

  • 24°C maximum daytime temperature in September in Harrisburg24
    24°C max day temperature
  • 7 hours of sunshine per day
  • 9 days with some rainfall in September in Harrisburg9
    9 days with some rainfall
  • 13°C minimum night-time temperature in September in Harrisburg13
    13°C min night temperature
  • 12 hours of daylight per day in September in Harrisburg12
    12 hours of daylight per day
  • No heat & humidity in September in Harrisburg0
    No heat & humidity
  • 90 mm monthly rainfall in September in Harrisburg90
    90 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Harrisburg6
    6 (High) UV index

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The September weather guide for Pennsylvania (Harrisburg) 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 / mm)  |  Imperial (°F / inches)

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More about the USA

How hot is it in Harrisburg in September?

Daytime temperatures usually reach 24°C in Harrisburg in September, falling to 13°C at night.

How sunny is it in Harrisburg in September?

There are normally 7 hours of bright sunshine each day in Harrisburg in September - that's 60% of daylight hours.

Does it rain in Harrisburg in September?

There are usually 9 days with some rain in Harrisburg in September and the average monthly rainfall is 90mm.

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

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

Harrisburg September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:35 18:39
Monday, 15th September 2025 05:49 18:16
Tuesday, 30th September 2025 06:03 17:51

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