McDonough County weather, town by town
11 places in McDonough 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 1895 to 2026. Station extremes, not official state records.
McDonough County Weather Facts
McDonough County has 11 places on myweatherrock (7 villages, 3 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 La Harpe on August 9, 1934. The coldest night is -30°F at La Harpe on February 13, 1905. The wettest day brought 10.25 inches of rain at La Harpe on June 10, 1905. The biggest single-day snow measured 15.98 inches at Prairie City 2S on February 2, 2011. Those are station measurements from NOAA's daily records, 1895 to 2026, not official state records. By area the largest place is Macomb, about 11 square miles.
About McDonough County weather
The map on the Now tab shows every McDonough 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 11 McDonough 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 11 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.
McDonough County weather records
Measured at the NOAA stations serving these towns, daily records 1895 to 2026. Station extremes, not official state records.
Common questions about McDonough County weather
- What is the hottest temperature recorded at a McDonough County station?
- 113°F at La Harpe on August 9, 1934, in the NOAA daily station records myweatherrock holds (1895 to 2026).
- What is the coldest temperature recorded at a McDonough County station?
- -30°F at La Harpe on February 13, 1905.
- What is the most rain a McDonough County station has measured in one day?
- 10.25 inches at La Harpe on June 10, 1905.
- What is the biggest one-day snowfall at a McDonough County station?
- 15.98 inches at Prairie City 2S on February 2, 2011.
- How many McDonough County towns have a weather page here?
- 11: 7 villages, 3 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 McDonough 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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