How reliable is this forecast?

Values for 10 days ahead show a trend; they are updated as the date approaches and may change.

Weather · United States

Illinois 10-Day Weather Forecast

Over the 10 days from October 17 to October 26, temperatures in Illinois will range from 3°C to 25°C; the warmest day is October 24. No significant rain is expected during this period. Values beyond day 7 indicate a trend and are updated daily.

Illinois 10-day forecast table

The bar shows each day's range against the period's lowest and highest temperature.

Frequently asked questions

What will the weather be like in Illinois over the next 10 days?: Over the 10 days from October 17 to October 26, temperatures in Illinois will range from 3°C to 25°C; the warmest day is October 24. No significant rain is expected during this period. Values beyond day 7 indicate a trend and are updated daily.
How reliable is this forecast?: Values for 10 days ahead show a trend; they are updated as the date approaches and may change.