Blaine County weather, town by town
11 places in Blaine 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 1895 to 2026. Station extremes, not official state records.
Blaine County Weather Facts
Blaine County has 11 places on myweatherrock (9 census-designated places, 2 cities), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 110°F at Chinook on July 27, 1917. The coldest night is -53°F at Chinook on December 21, 1989. The wettest day brought 6.3 inches of rain at Zortman on June 22, 2019. The biggest single-day snow measured 17.99 inches at Zortman on May 11, 2016. Those are station measurements from NOAA's daily records, 1895 to 2026, not official state records. By area the largest place is Fort Belknap Agency, about 46 square miles.
About Blaine County weather
The map on the Now tab shows every Blaine 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 10 Blaine County towns with station normals, the warmest month is July, when the day usually reaches 84°F, and the coldest is January, when the night usually falls to 7°F. June is the wettest, with rain on about 11 days. July afternoons run from about 80°F in Hays to 87°F in Fort Belknap Agency. January nights run from about 4°F in Chinook to 13°F in Hays.
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.
Blaine County weather records
Measured at the NOAA stations serving these towns, daily records 1895 to 2026. Station extremes, not official state records.
Common questions about Blaine County weather
- What is the hottest temperature recorded at a Blaine County station?
- 110°F at Chinook on July 27, 1917, in the NOAA daily station records myweatherrock holds (1895 to 2026).
- What is the coldest temperature recorded at a Blaine County station?
- -53°F at Chinook on December 21, 1989.
- What is the most rain a Blaine County station has measured in one day?
- 6.3 inches at Zortman on June 22, 2019.
- What is the biggest one-day snowfall at a Blaine County station?
- 17.99 inches at Zortman on May 11, 2016.
- How many Blaine County towns have a weather page here?
- 11: 9 census-designated places, 2 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 Blaine 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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