Hamilton, MT
Climate overview — based on NOAA 1991-2020 normals from HAMILTON, MT US.
Year-round temperatures (°F)
Climate summary
Hamilton has an annual average temperature of 44.8°F with about 13.6 inches of precipitation per year. The warmest month is July (average high 84.0°F), and the coldest is December (average low 17.9°F). June is typically the wettest month (1.65 in) and August the driest (0.80 in).
Best time to visit Hamilton
Full guide →Climate change signal
All-time records →31 of 366 (8.5%) of Hamilton'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.
| 1890s | 4 | |
| 1900s | 43 | |
| 1910s | 29 | |
| 1920s | 13 | |
| 1930s | 65 | |
| 1940s | 18 | |
| 1950s | 22 | |
| 1960s | 30 | |
| 1970s | 11 | |
| 1980s | 34 | |
| 1990s | 25 | |
| 2000s | 25 | |
| 2010s | 36 | |
| 2020s | 11 |
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 | 35.1°F | 18.9°F | 27.0°F | 0.96 in | — | 9 |
| February | 39.2°F | 19.5°F | 29.3°F | 1.18 in | — | 9 |
| March | 48.9°F | 24.6°F | 36.7°F | 0.98 in | — | 10 |
| April | 56.1°F | 30.7°F | 43.4°F | 1.12 in | — | 9 |
| May | 65.5°F | 38.2°F | 51.9°F | 1.53 in | — | 11 |
| June | 73.0°F | 44.7°F | 58.9°F | 1.65 in | — | 10 |
| July | 84.0°F | 49.7°F | 66.8°F | 0.85 in | — | 7 |
| August | 82.4°F | 47.7°F | 65.0°F | 0.80 in | — | 7 |
| September | 71.9°F | 40.4°F | 56.2°F | 0.81 in | — | 6 |
| October | 56.8°F | 30.9°F | 43.9°F | 0.94 in | — | 9 |
| November | 42.6°F | 23.2°F | 32.9°F | 1.45 in | — | 10 |
| December | 33.5°F | 17.9°F | 25.7°F | 1.33 in | — | 10 |
Climate twins of Hamilton
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).