Illinois weather in June 2025

Expect 27°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Illinois in June. Check more long-term weather averages for Illinois in June before you book your next holiday to Illinois in 2025/2026.

  • 27°C maximum daytime temperature in June in Illinois (Chicago)27
    27°C max day temperature
  • 10 hours of sunshine per day
  • 10 days with some rainfall in June in Illinois (Chicago)10
    10 days with some rainfall
  • 14°C minimum night-time temperature in June in Illinois (Chicago)14
    14°C min night temperature
  • 15 hours of daylight per day in June in Illinois (Chicago)15
    15 hours of daylight per day
  • Low heat & humidity in June in Illinois (Chicago)L
    Low heat & humidity
  • 96 mm monthly rainfall in June in Illinois (Chicago)96
    96 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in June in Illinois (Chicago)9
    9 (Very High) UV index
  • 12°C sea temperature in June in Illinois (Chicago)12
    12°C sea temperature

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The June weather guide for Illinois (Chicago) 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.

Top Illinois destinations

Below are average maximum temperatures at popular countries and places in Illinois in June. Select a holiday destination to see more weather parameters.

All Illinois destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Illinois in June?

Daytime temperatures usually reach 27°C in Chicago, Illinois in June with low heat and humidity, falling to 14°C at night.

How sunny is it in Illinois in June?

There are normally 10 hours of bright sunshine each day in Chicago, Illinois in June - that's 68% of daylight hours.

How warm is the sea around Illinois in June?

The average sea temperature around Chicago, Illinois in June is 12°C.

Does it rain in Illinois in June?

There are usually 10 days with some rain in Chicago, Illinois in June and the average monthly rainfall is 96mm.

Illinois June sunrise & sunset times

Browse the sunrise and sunset times for Illinois in June 2025. Select a month to view Illinois sunrise and sunset times for the next 12 months. The Illinois sunrise and sunset times shown below are for Chicago.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st June 2025 04:18 19:20
Sunday, 15th June 2025 04:15 19:28
Monday, 30th June 2025 04:19 19:30

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