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Best time to go to Illinois
Below is the hottest it usually gets at popular destinations in Illinois. Select a destination to see the best time to go based on your preferred weather.
The best time to go guide for Illinois shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia) & the Met Office. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
Best time to go to Illinois, USA
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