McLean County weather, town by town
23 places in McLean County, Illinois, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
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Measured at the NOAA stations serving these towns, daily records 1906 to 2026. Station extremes, not official state records.
McLean County Weather Facts
McLean County has 23 places on myweatherrock (16 villages, 4 cities, 2 census-designated places, 1 towns), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 113°F at Lincoln on July 15, 1936. The coldest night is -36°F at Congerville 2Nw on January 5, 1999. The wettest day brought 7.12 inches of rain at Bloomington Wtr Wks on September 20, 1986. The biggest single-day snow measured 13.58 inches at Mackinaw 3Wsw on February 2, 2011. Those are station measurements from NOAA's daily records, 1906 to 2026, not official state records. By area the largest place is Bloomington, about 27 square miles.
About McLean County weather
The map on the Now tab shows every McLean County 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 23 McLean County towns with station normals, the warmest month is July, when the day usually reaches 86°F, and the coldest is January, when the night usually falls to 16°F. May is the wettest, with rain on about 12 days.
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.
McLean County weather records
Measured at the NOAA stations serving these towns, daily records 1906 to 2026. Station extremes, not official state records.
Common questions about McLean County weather
- What is the hottest temperature recorded at a McLean County station?
- 113°F at Lincoln on July 15, 1936, in the NOAA daily station records myweatherrock holds (1906 to 2026).
- What is the coldest temperature recorded at a McLean County station?
- -36°F at Congerville 2Nw on January 5, 1999.
- What is the most rain a McLean County station has measured in one day?
- 7.12 inches at Bloomington Wtr Wks on September 20, 1986.
- What is the biggest one-day snowfall at a McLean County station?
- 13.58 inches at Mackinaw 3Wsw on February 2, 2011.
- How many McLean County towns have a weather page here?
- 23: 16 villages, 4 cities, 2 census-designated places, 1 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 McLean County 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.
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