Grass Range, MT
Climate overview — based on NOAA 1991-2020 normals from GRASS RANGE, MT US.
Year-round temperatures (°F)
Climate summary
Grass Range has an annual average temperature of 45.5°F with about 17.9 inches of precipitation per year and 50.1 inches of snow. The warmest month is July (average high 83.3°F), and the coldest is January (average low 14.2°F). May is typically the wettest month (3.39 in) and February the driest (0.51 in). Snow typically falls from October through May.
Best time to visit Grass Range
Full guide →Climate change signal
All-time records →24 of 366 (6.6%) of Grass Range's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1910s | 5 | |
| 1930s | 64 | |
| 1940s | 29 | |
| 1950s | 33 | |
| 1960s | 45 | |
| 1970s | 38 | |
| 1980s | 86 | |
| 1990s | 25 | |
| 2000s | 16 | |
| 2010s | 9 | |
| 2020s | 16 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 37.2°F | 14.2°F | 25.7°F | 0.68 in | 8.7 in | 6 |
| February | 38.8°F | 15.7°F | 27.2°F | 0.51 in | 7.8 in | 6 |
| March | 48.2°F | 23.0°F | 35.6°F | 0.87 in | 9.2 in | 7 |
| April | 57.1°F | 30.7°F | 43.9°F | 1.85 in | 4.8 in | 8 |
| May | 66.0°F | 39.5°F | 52.8°F | 3.39 in | 0.9 in | 12 |
| June | 74.0°F | 47.4°F | 60.7°F | 3.22 in | — | 12 |
| July | 83.3°F | 52.9°F | 68.1°F | 1.70 in | — | 9 |
| August | 82.7°F | 51.9°F | 67.3°F | 1.67 in | — | 7 |
| September | 72.6°F | 43.5°F | 58.0°F | 1.46 in | 0.1 in | 6 |
| October | 58.9°F | 33.4°F | 46.1°F | 1.25 in | 3.4 in | 7 |
| November | 46.3°F | 22.7°F | 34.5°F | 0.71 in | 6.4 in | 5 |
| December | 37.7°F | 15.2°F | 26.4°F | 0.55 in | 8.8 in | 5 |
Climate twins of Grass Range
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).