Illinois weather in August 2020

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

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The August weather guide for 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 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 sunrise & sunset times for August 2020

Browse the sunrise & sunset times for Illinois in August 2020. Select a month to view Illinois sunrise & sunset times for the next twelve months. The Illinois sunrise & sunset times shown below are for Chicago.


Date Sunrise times Sunset times
Saturday, 1st August 2020 05:45 20:08
Sunday, 16th August 2020 06:00 19:48
Monday, 31st August 2020 06:16 19:25
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Metric (°C / mm)  |  Imperial (°F / inches)

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