Big Sandy, MT
Climate overview — based on NOAA 1991-2020 normals from BIG SANDY, MT US.
Year-round temperatures (°F)
Climate summary
Big Sandy has an annual average temperature of 45.1°F with about 13.3 inches of precipitation per year. The warmest month is July (average high 85.9°F), and the coldest is January (average low 9.8°F). June is typically the wettest month (3.12 in) and February the driest (0.39 in).
Best time to visit Big Sandy
Full guide →Climate change signal
All-time records →25 of 366 (6.8%) of Big Sandy'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.
| 1920s | 13 | |
| 1930s | 78 | |
| 1940s | 30 | |
| 1950s | 24 | |
| 1960s | 42 | |
| 1970s | 23 | |
| 1980s | 52 | |
| 1990s | 40 | |
| 2000s | 32 | |
| 2010s | 17 | |
| 2020s | 15 |
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 | 30.8°F | 9.8°F | 20.3°F | 0.45 in | — | 3 |
| February | 35.2°F | 13.4°F | 24.3°F | 0.39 in | — | 2 |
| March | 46.0°F | 22.0°F | 34.0°F | 0.47 in | — | 3 |
| April | 58.4°F | 32.6°F | 45.5°F | 1.27 in | — | 5 |
| May | 67.9°F | 41.2°F | 54.6°F | 2.07 in | — | 7 |
| June | 75.9°F | 48.9°F | 62.4°F | 3.12 in | — | 9 |
| July | 85.9°F | 54.6°F | 70.3°F | 1.40 in | — | 5 |
| August | 84.8°F | 53.4°F | 69.1°F | 0.99 in | — | 4 |
| September | 73.7°F | 44.2°F | 59.0°F | 1.16 in | — | 4 |
| October | 58.7°F | 32.5°F | 45.6°F | 0.93 in | — | 4 |
| November | 43.6°F | 21.5°F | 32.6°F | 0.60 in | — | 3 |
| December | 33.5°F | 13.0°F | 23.3°F | 0.43 in | — | 2 |
Climate twins of Big Sandy
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).