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Illinois weather in August 2022
- 2828°C max day temperature
- 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
Below are average maximum temperatures at popular destinations in Illinois in August. Select a destination to see more weather parameters.
Recommended for Illinois
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.
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 2022. 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.
|Date||Sunrise times||Sunset times|
|Monday, 1st August 2022||05:44||20:09|
|Tuesday, 16th August 2022||06:00||19:49|
|Wednesday, 31st August 2022||06:15||19:26|
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