Sweet Grass County weather, town by town
2 places in Sweet Grass County, Montana, 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 1894 to 2026. Station extremes, not official state records.
Sweet Grass County Weather Facts
Sweet Grass County has 2 places on myweatherrock (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 110°F at Big Timber on July 21, 1931. The coldest night is -47°F at Big Timber on February 15, 1936. The wettest day brought 4 inches of rain at Big Timber on May 19, 1938. The biggest single-day snow measured 24.02 inches at Big Timber on January 26, 1975. Those are station measurements from NOAA's daily records, 1894 to 2026, not official state records. By area the largest place is Big Timber, about 1 square miles.
About Sweet Grass County weather
The map on the Now tab shows every Sweet Grass 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 2 Sweet Grass 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 19°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.
Sweet Grass County weather records
Measured at the NOAA stations serving these towns, daily records 1894 to 2026. Station extremes, not official state records.
Common questions about Sweet Grass County weather
- What is the hottest temperature recorded at a Sweet Grass County station?
- 110°F at Big Timber on July 21, 1931, in the NOAA daily station records myweatherrock holds (1894 to 2026).
- What is the coldest temperature recorded at a Sweet Grass County station?
- -47°F at Big Timber on February 15, 1936.
- What is the most rain a Sweet Grass County station has measured in one day?
- 4 inches at Big Timber on May 19, 1938.
- What is the biggest one-day snowfall at a Sweet Grass County station?
- 24.02 inches at Big Timber on January 26, 1975.
- How many Sweet Grass County towns have a weather page here?
- 2: 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 Sweet Grass 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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