St. Clair County weather, town by town
7 places in St. Clair County, Missouri, 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 1893 to 2026. Station extremes, not official state records.
St. Clair County Weather Facts
St. Clair County has 7 places on myweatherrock (3 cities, 3 villages, 1 towns), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 116°F at Appleton City on July 14, 1954. The coldest night is -29°F at Appleton City on February 13, 1905. The wettest day brought 11.75 inches of rain at Osceola 0.3 Sw on July 31, 2020. The biggest single-day snow measured 17.99 inches at Appleton City on February 13, 1914. Those are station measurements from NOAA's daily records, 1893 to 2026, not official state records. By area the largest place is Roscoe, about 2 square miles.
About St. Clair County weather
The map on the Now tab shows every St. Clair 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 7 St. Clair County towns with station normals, the warmest month is July, when the day usually reaches 90°F, and the coldest is January, when the night usually falls to 23°F. May is the wettest, with rain on about 9 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.
St. Clair County weather records
Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
Common questions about St. Clair County weather
- What is the hottest temperature recorded at a St. Clair County station?
- 116°F at Appleton City on July 14, 1954, in the NOAA daily station records myweatherrock holds (1893 to 2026).
- What is the coldest temperature recorded at a St. Clair County station?
- -29°F at Appleton City on February 13, 1905.
- What is the most rain a St. Clair County station has measured in one day?
- 11.75 inches at Osceola 0.3 Sw on July 31, 2020.
- What is the biggest one-day snowfall at a St. Clair County station?
- 17.99 inches at Appleton City on February 13, 1914.
- How many St. Clair County towns have a weather page here?
- 7: 3 cities, 3 villages, 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 St. Clair 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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