Mason County weather, town by town
10 places in Mason 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.
Mason County Weather Facts
Mason County has 10 places on myweatherrock (7 villages, 2 cities, 1 census-designated places), 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 -34°F at Lincoln on January 15, 1927. The wettest day brought 7.14 inches of rain at Havana on July 13, 1937. The biggest single-day snow measured 15.98 inches at Havana 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 Havana, about 3 square miles.
About Mason County weather
The map on the Now tab shows every Mason 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 5 Mason 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 17°F. April 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.
Mason 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 Mason County weather
- What is the hottest temperature recorded at a Mason 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 Mason County station?
- -34°F at Lincoln on January 15, 1927.
- What is the most rain a Mason County station has measured in one day?
- 7.14 inches at Havana on July 13, 1937.
- What is the biggest one-day snowfall at a Mason County station?
- 15.98 inches at Havana on February 2, 2011.
- How many Mason County towns have a weather page here?
- 10: 7 villages, 2 cities, 1 census-designated places. 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 Mason 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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