Springfield weather in September 2025

Expect daytime maximum temperatures of 26°C in Springfield, Illinois in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 85 mm of rainfall in the month.

  • 26°C maximum daytime temperature in September in Springfield26
    26°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Springfield8
    8 days with some rainfall
  • 13°C minimum night-time temperature in September in Springfield13
    13°C min night temperature
  • 12 hours of daylight per day in September in Springfield12
    12 hours of daylight per day
  • Low heat & humidity in September in SpringfieldL
    Low heat & humidity
  • 85 mm monthly rainfall in September in Springfield85
    85 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Springfield6
    6 (High) UV index

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The September weather guide for Illinois (Springfield) 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 Springfield in September?

Daytime temperatures usually reach 26°C in Springfield in September with low heat and humidity, falling to 13°C at night.

How sunny is it in Springfield in September?

There are normally 8 hours of bright sunshine each day in Springfield in September - that's 66% of daylight hours.

Does it rain in Springfield in September?

There are usually 8 days with some rain in Springfield in September and the average monthly rainfall is 85mm.

Springfield September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:27 18:29
Monday, 15th September 2025 05:40 18:07
Tuesday, 30th September 2025 05:54 17:42

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