Decatur weather in June 2025

Expect 84°F daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Decatur in June. Check more long-term weather averages for Decatur in June before you book your next holiday to Illinois in 2025/2026.

  • 84°F maximum daytime temperature in June in Decatur84
    84°F max day temperature
  • 10 hours of sunshine per day
  • 9 days with some rainfall in June in Decatur9
    9 days with some rainfall
  • 61°F minimum night-time temperature in June in Decatur61
    61°F min night temperature
  • 15 hours of daylight per day in June in Decatur15
    15 hours of daylight per day
  • Moderate heat & humidity in June in DecaturM
    Moderate heat & humidity
  • 3.9 inches monthly rainfall in June in Decatur3.9
    3.9 inches of monthly rainfall
  • UV (maximum) index 9 (Very High) in June in Decatur9
    9 (Very High) UV index

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The June weather guide for Illinois (Decatur) 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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How hot is it in Decatur in June?

Daytime temperatures usually reach 84°F in Decatur in June with moderate heat and humidity, falling to 61°F at night.

How sunny is it in Decatur in June?

There are normally 10 hours of bright sunshine each day in Decatur in June - that's 69% of daylight hours.

Does it rain in Decatur in June?

There are usually 9 days with some rain in Decatur in June and the average monthly rainfall is 3.9 inches.

Decatur June sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st June 2025 04:29 19:18
Sunday, 15th June 2025 04:27 19:26
Monday, 30th June 2025 04:31 19:28

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