Roundup, MT
Climate overview — based on NOAA 1991-2020 normals from ROUNDUP, MT US.
Year-round temperatures (°F)
Climate summary
Roundup has an annual average temperature of 46.5°F with about 14.9 inches of precipitation per year and 24.4 inches of snow. The warmest month is July (average high 88.9°F), and the coldest is January (average low 13.1°F). June is typically the wettest month (2.89 in) and January the driest (0.37 in). Snow typically falls from October through April.
Best time to visit Roundup
Full guide →Climate change signal
All-time records →24 of 366 (6.6%) of Roundup'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 | 12 | |
| 1920s | 6 | |
| 1930s | 52 | |
| 1940s | 56 | |
| 1950s | 35 | |
| 1960s | 35 | |
| 1970s | 30 | |
| 1980s | 41 | |
| 1990s | 17 | |
| 2000s | 46 | |
| 2010s | 36 |
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 | 13.1°F | 25.1°F | 0.37 in | 5.2 in | 4 |
| February | 40.7°F | 14.9°F | 27.8°F | 0.42 in | 3.9 in | 4 |
| March | 50.6°F | 22.1°F | 36.3°F | 0.71 in | 4.4 in | 5 |
| April | 59.9°F | 30.0°F | 44.9°F | 1.71 in | 1.4 in | 8 |
| May | 69.1°F | 39.3°F | 54.2°F | 2.55 in | 0.1 in | 10 |
| June | 78.3°F | 47.8°F | 63.1°F | 2.89 in | — | 11 |
| July | 88.9°F | 53.5°F | 71.2°F | 1.70 in | — | 7 |
| August | 87.9°F | 51.1°F | 69.5°F | 1.21 in | — | 5 |
| September | 76.9°F | 42.4°F | 59.6°F | 1.20 in | — | 5 |
| October | 60.9°F | 31.7°F | 46.3°F | 1.22 in | 1.0 in | 7 |
| November | 46.6°F | 21.8°F | 34.2°F | 0.49 in | 2.8 in | 4 |
| December | 37.2°F | 14.2°F | 25.7°F | 0.41 in | 5.6 in | 5 |
Climate twins of Roundup
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).