Decatur weather in September 2020

  • 26°C maximum daytime temperature in September in Decatur26
    26°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Decatur8
    8 days with some rainfall
  • 13°C minimum night-time temperature in September in Decatur13
    13°C min night temperature
  • 12 hours of daylight per day in September in Decatur12
    12 hours of daylight per day
  • Low heat & humidity in September in DecaturL
    Low heat & humidity
  • 81 mm monthly rainfall in September in Decatur81
    81 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Decatur6
    6 (High) UV index
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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The September weather guide for Decatur, Illinois 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.

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How hot is it in Decatur in September?

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

How sunny is it in Decatur in September?

There are normally 8 hours of bright sunshine each day in Decatur in September - that's 65% of daylight hours.

Does it rain in Decatur in September?

There are usually 8 days with some rain in Decatur in September and the average monthly rainfall is 81mm.

Decatur sunrise & sunset times for September 2020

Browse the sunrise & sunset times for Decatur in September 2020. Select a month to view Decatur sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2020 06:24 19:26
Tuesday, 15th September 2020 06:37 19:04
Wednesday, 30th September 2020 06:52 18:39
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Metric (°C / mm)  |  Imperial (°F / inches)

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Where's hot in Illinois in September?

Below are average maximum temperatures at popular destinations in Illinois in September. Select a destination to see more weather parameters.

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