Grundy County weather, town by town
13 places in Grundy 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 1911 to 2026. Station extremes, not official state records.
Grundy County Weather Facts
Grundy County has 13 places on myweatherrock (12 villages, 1 cities), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 109°F at Morris 1Nw on July 14, 1936. The coldest night is -26°F at Morris 1Nw on December 28, 1924. The wettest day brought 7.96 inches of rain at Carbon Hill 3.1 N on September 28, 2019. The biggest single-day snow measured 15.98 inches at Dwight Wwtp on January 2, 1999. Those are station measurements from NOAA's daily records, 1911 to 2026, not official state records. By area the largest place is Channahon, about 17 square miles.
About Grundy County weather
The map on the Now tab shows every Grundy 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 13 Grundy County towns with station normals, the warmest month is July, when the day usually reaches 85°F, and the coldest is January, when the night usually falls to 15°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.
Grundy County weather records
Measured at the NOAA stations serving these towns, daily records 1911 to 2026. Station extremes, not official state records.
Common questions about Grundy County weather
- What is the hottest temperature recorded at a Grundy County station?
- 109°F at Morris 1Nw on July 14, 1936, in the NOAA daily station records myweatherrock holds (1911 to 2026).
- What is the coldest temperature recorded at a Grundy County station?
- -26°F at Morris 1Nw on December 28, 1924.
- What is the most rain a Grundy County station has measured in one day?
- 7.96 inches at Carbon Hill 3.1 N on September 28, 2019.
- What is the biggest one-day snowfall at a Grundy County station?
- 15.98 inches at Dwight Wwtp on January 2, 1999.
- How many Grundy County towns have a weather page here?
- 13: 12 villages, 1 cities. 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 Grundy 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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