Granite County weather, town by town
4 places in Granite 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 1927 to 2026. Station extremes, not official state records.
Granite County Weather Facts
Granite County has 4 places on myweatherrock (2 towns, 2 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 Drummond Aviation on July 11, 2002. The coldest night is -48°F at Drummond Aviation on January 26, 1957. The wettest day brought 3.45 inches of rain at Philipsburg Rs on June 13, 2017. The biggest single-day snow measured 20 inches at Philipsburg Rs on April 26, 1975. Those are station measurements from NOAA's daily records, 1927 to 2026, not official state records. By area the largest place is Maxville, about 7 square miles.
About Granite County weather
The map on the Now tab shows every Granite 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 4 Granite County towns with station normals, the warmest month is July, when the day usually reaches 83°F, and the coldest is December, when the night usually falls to 14°F. June is the wettest, with rain on about 11 days. July afternoons run from about 77°F in Maxville to 86°F in Drummond. December nights run from about 13°F in Drummond to 16°F in Maxville.
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.
Granite County weather records
Measured at the NOAA stations serving these towns, daily records 1927 to 2026. Station extremes, not official state records.
Common questions about Granite County weather
- What is the hottest temperature recorded at a Granite County station?
- 104°F at Drummond Aviation on July 11, 2002, in the NOAA daily station records myweatherrock holds (1927 to 2026).
- What is the coldest temperature recorded at a Granite County station?
- -48°F at Drummond Aviation on January 26, 1957.
- What is the most rain a Granite County station has measured in one day?
- 3.45 inches at Philipsburg Rs on June 13, 2017.
- What is the biggest one-day snowfall at a Granite County station?
- 20 inches at Philipsburg Rs on April 26, 1975.
- How many Granite County towns have a weather page here?
- 4: 2 towns, 2 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 Granite 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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