# Counties in Montana by average annual temperature, 2025

All 56 values come from NOAA National Centers for Environmental Information for 2025, so the places are comparable.

- Indicator id: `average_temperature_annual`
- Unit: °F
- Definition: Mean air temperature from January to December, in degrees Fahrenheit: the average of the 12 monthly mean temperatures. NOAA computes it from its climate divisional dataset (nClimDiv): station readings interpolated onto a 5 km grid and averaged over the area.
- Source: NOAA National Centers for Environmental Information, NOAA Climate at a Glance, January to December average temperature, counties (https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping)
- Publisher page: https://invokely.ai/en/publishers/noaa-ncei
- Retrieved: 2026-10-12
- Citation: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/average-annual-temperature/montana-counties

| Rank | Place | °F |
|---:|---|---:|
| 1 | Yellowstone County | 47.5 |
| 2 | Treasure County | 47.1 |
| 3 | Musselshell County | 46.9 |
| 3 | Petroleum County | 46.9 |
| 5 | Custer County | 46.7 |
| 6 | Big Horn County | 46.4 |
| 6 | Rosebud County | 46.4 |
| 8 | Powder River County | 46.3 |
| 9 | Garfield County | 45.9 |
| 10 | Lake County | 45.8 |
| 10 | Prairie County | 45.8 |
| 12 | Golden Valley County | 45.6 |
| 13 | Carter County | 45.5 |
| 14 | Chouteau County | 45.4 |
| 15 | Stillwater County | 45 |
| 16 | Cascade County | 44.9 |
| 16 | Fergus County | 44.9 |
| 18 | Carbon County | 44.8 |
| 18 | Fallon County | 44.8 |
| 18 | Sanders County | 44.8 |
| 21 | McCone County | 44.6 |
| 22 | Dawson County | 44.4 |
| 22 | Phillips County | 44.4 |
| 24 | Broadwater County | 44.3 |
| 24 | Richland County | 44.3 |
| 24 | Wibaux County | 44.3 |
| 27 | Lincoln County | 44.1 |
| 27 | Sweet Grass County | 44.1 |
| 29 | Mineral County | 43.9 |
| 29 | Wheatland County | 43.9 |
| 31 | Blaine County | 43.6 |
| 32 | Teton County | 43.5 |
| 33 | Pondera County | 43.4 |
| 33 | Toole County | 43.4 |
| 35 | Judith Basin County | 43.3 |
| 35 | Missoula County | 43.3 |
| 37 | Liberty County | 43 |
| 38 | Lewis and Clark County | 42.8 |
| 38 | Valley County | 42.8 |
| 40 | Hill County | 42.7 |
| 40 | Roosevelt County | 42.7 |
| 42 | Jefferson County | 42.6 |
| 43 | Flathead County | 42.2 |
| 44 | Ravalli County | 41.9 |
| 45 | Gallatin County | 41.8 |
| 45 | Madison County | 41.8 |
| 45 | Meagher County | 41.8 |
| 48 | Powell County | 41.6 |
| 49 | Silver Bow County | 41.4 |
| 50 | Glacier County | 41.3 |
| 51 | Sheridan County | 41.2 |
| 52 | Park County | 41 |
| 53 | Daniels County | 40.9 |
| 54 | Granite County | 40.8 |
| 55 | Beaverhead County | 40.5 |
| 56 | Deer Lodge County | 39.8 |