Chicago area weather, town by town

About Chicago area weather

The map on the Now tab shows every Chicago area town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.

What the weather is usually like

Across the 472 Chicago area towns with station normals, the warmest month is July, when the day usually reaches 84°F, and the coldest is January, when the night usually falls to 15°F. May is the wettest, with rain on about 12 days. July afternoons run from about 81°F in Beach Park to 86°F in Cornell. January nights run from about 11°F in Adeline to 21°F in Chicago.

Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.

Where these numbers come from

• Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
• Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
• Warnings and alerts: the National Weather Service, passed through unchanged.

Chicago area weather records

Measured at the NOAA stations serving these towns, daily records 1892 to 2026. Station extremes, not official state records.

Common questions about Chicago area weather

What is the hottest temperature recorded at a Chicago area station?

112°F at Ottawa 4Sw on July 21, 1901, in the NOAA daily station records myweatherrock holds (1892 to 2026).

What is the coldest temperature recorded at a Chicago area station?

-36°F at Brodhead Wwtp on January 30, 1951.

What is the most rain a Chicago area station has measured in one day?

16.91 inches at Aurora Water on July 18, 1996.

What is the biggest one-day snowfall at a Chicago area station?

21.1 inches at Woodstock 5Nw on February 2, 2011.

How many Chicago area towns have a weather page here?

491: 342 villages, 83 cities, 63 census-designated places, 3 towns. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.

Where does the Chicago area forecast come from?

NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.