Champaign weather in September 2025

Expect daytime maximum temperatures of 25°C in Champaign in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 82 mm of rainfall in the month.

  • 25°C maximum daytime temperature in September in Champaign25
    25°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Champaign8
    8 days with some rainfall
  • 13°C minimum night-time temperature in September in Champaign13
    13°C min night temperature
  • 12 hours of daylight per day in September in Champaign12
    12 hours of daylight per day
  • Low heat & humidity in September in ChampaignL
    Low heat & humidity
  • 82 mm monthly rainfall in September in Champaign82
    82 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Champaign6
    6 (High) UV index

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The September weather guide for Illinois (Champaign) 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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How hot is it in Champaign in September?

Daytime temperatures usually reach 25°C in Champaign in September with low heat and humidity, falling to 13°C at night.

How sunny is it in Champaign in September?

There are normally 8 hours of bright sunshine each day in Champaign in September - that's 64% of daylight hours.

Does it rain in Champaign in September?

There are usually 8 days with some rain in Champaign in September and the average monthly rainfall is 82mm.

Champaign September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:21 18:24
Monday, 15th September 2025 05:34 18:01
Tuesday, 30th September 2025 05:49 17:36

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