Where do the archive values come from?

They are the last update we made for that day from Open-Meteo weather model data. They are not official weather station measurements, so small differences are possible.

Are older dates available?

The archive started on October 14, 2026; there are no records for earlier days.

Weather · United States

Illinois Weather History

The Illinois weather archive covers 2 days since October 14, 2026. For each day we record the high and low temperature, precipitation, wind and conditions; tap a month or a day for details.

Recent days

Today’s forecast

Illinois: weather month by month

October 202624° / 17°6.2 mm

Frequently asked questions

Where do the archive values come from?: They are the last update we made for that day from Open-Meteo weather model data. They are not official weather station measurements, so small differences are possible.
Are older dates available?: The archive started on October 14, 2026; there are no records for earlier days.