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Illinois weather in August 2024
Expect 28°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Illinois in August. Check more long-term weather averages for Illinois in August before you book your next holiday to Illinois in 2024/2025.
- 2828°C max day temperature
- 9 hours of sunshine per day
- 99 days with some rainfall
- 1616°C min night temperature
- 1414 hours of daylight per day
- MModerate heat & humidity
- 9797 mm of monthly rainfall
- 88 (Very High) UV index
- 2121°C sea temperature
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The August 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 destinations in Illinois in August. Select a destination to see more weather parameters.
All Illinois destinations
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Illinois in August?
Daytime temperatures usually reach 28°C in Chicago, Illinois in August with moderate heat and humidity, falling to 16°C at night.
How sunny is it in Illinois in August?
There are normally 9 hours of bright sunshine each day in Chicago, Illinois in August - that's 67% of daylight hours.
How warm is the sea around Illinois in August?
The average sea temperature around Chicago, Illinois in August is 21°C.
Does it rain in Illinois in August?
There are usually 9 days with some rain in Chicago, Illinois in August and the average monthly rainfall is 97mm.
Illinois August sunrise & sunset times
Browse the sunrise and sunset times for Illinois in August 2024. 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 |
---|---|---|
Thursday, 1st August 2024 | 05:45 | 20:08 |
Friday, 16th August 2024 | 06:00 | 19:48 |
Saturday, 31st August 2024 | 06:16 | 19:25 |
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