Stephenson County weather, town by town
12 places in Stephenson 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 1943 to 2026. Station extremes, not official state records.
Stephenson County Weather Facts
Stephenson County has 12 places on myweatherrock (10 villages, 1 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 104°F at Monroe Wwtp on July 6, 2012. The coldest night is -32°F at Stockton 3Nne on January 31, 2019. The wettest day brought 10.1 inches of rain at Monroe Wwtp on July 18, 1996. The biggest single-day snow measured 15 inches at Stockton 3Nne on February 1, 2011. Those are station measurements from NOAA's daily records, 1943 to 2026, not official state records. By area the largest place is Freeport, about 12 square miles.
About Stephenson County weather
The map on the Now tab shows every Stephenson 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 12 Stephenson County towns with station normals, the warmest month is July, when the day usually reaches 83°F, and the coldest is January, when the night usually falls to 11°F. May is the wettest, with rain on about 13 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.
Stephenson County weather records
Measured at the NOAA stations serving these towns, daily records 1943 to 2026. Station extremes, not official state records.
Common questions about Stephenson County weather
- What is the hottest temperature recorded at a Stephenson County station?
- 104°F at Monroe Wwtp on July 6, 2012, in the NOAA daily station records myweatherrock holds (1943 to 2026).
- What is the coldest temperature recorded at a Stephenson County station?
- -32°F at Stockton 3Nne on January 31, 2019.
- What is the most rain a Stephenson County station has measured in one day?
- 10.1 inches at Monroe Wwtp on July 18, 1996.
- What is the biggest one-day snowfall at a Stephenson County station?
- 15 inches at Stockton 3Nne on February 1, 2011.
- How many Stephenson County towns have a weather page here?
- 12: 10 villages, 1 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 Stephenson 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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