Sullivan County weather, town by town
9 places in Sullivan 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.
Sullivan County Weather Facts
Sullivan County has 9 places on myweatherrock (3 cities, 3 villages, 2 towns, 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 114°F at Trenton on July 15, 1936. The coldest night is -31°F at Kirksville on February 13, 1905. The wettest day brought 7.52 inches of rain at Princeton 1.4 Nne on June 25, 2021. The biggest single-day snow measured 12.01 inches at Milan 1.2 Sw on February 27, 2013. Those are station measurements from NOAA's daily records, 1893 to 2026, not official state records. By area the largest place is Milan, about 2 square miles.
About Sullivan County weather
The map on the Now tab shows every Sullivan 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 8 Sullivan County towns with station normals, the warmest month is July, when the day usually reaches 87°F, and the coldest is January, when the night usually falls to 17°F. May is the wettest, with rain on about 12 days. July afternoons run from about 86°F in Green Castle to 89°F in Humphreys.
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.
Sullivan 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 Sullivan County weather
- What is the hottest temperature recorded at a Sullivan County station?
- 114°F at Trenton on July 15, 1936, in the NOAA daily station records myweatherrock holds (1893 to 2026).
- What is the coldest temperature recorded at a Sullivan County station?
- -31°F at Kirksville on February 13, 1905.
- What is the most rain a Sullivan County station has measured in one day?
- 7.52 inches at Princeton 1.4 Nne on June 25, 2021.
- What is the biggest one-day snowfall at a Sullivan County station?
- 12.01 inches at Milan 1.2 Sw on February 27, 2013.
- How many Sullivan County towns have a weather page here?
- 9: 3 cities, 3 villages, 2 towns, 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 Sullivan 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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