East Helena, MT
Climate overview — based on NOAA 1991-2020 normals from HELENA RGNL AP, MT US.
Year-round temperatures (°F)
Climate summary
East Helena has an annual average temperature of 45.5°F with about 11.4 inches of precipitation per year and 37.2 inches of snow. The warmest month is July (average high 86.1°F), and the coldest is January (average low 13.5°F). June is typically the wettest month (2.21 in) and January the driest (0.39 in). Snow typically falls from August through April.
Best time to visit East Helena
Full guide →Climate change signal
All-time records →85 of 366 (23.2%) of East Helena'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.
| 1930s | 14 | |
| 1940s | 22 | |
| 1950s | 30 | |
| 1960s | 45 | |
| 1970s | 16 | |
| 1980s | 41 | |
| 1990s | 44 | |
| 2000s | 60 | |
| 2010s | 38 | |
| 2020s | 56 |
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 | 32.4°F | 13.5°F | 23.0°F | 0.39 in | 6.6 in | 7 |
| February | 37.2°F | 17.2°F | 27.2°F | 0.42 in | 6.6 in | 7 |
| March | 47.5°F | 24.6°F | 36.1°F | 0.52 in | 4.6 in | 7 |
| April | 56.7°F | 32.4°F | 44.5°F | 1.02 in | 2.9 in | 9 |
| May | 66.4°F | 41.5°F | 53.9°F | 1.95 in | 0.1 in | 11 |
| June | 74.7°F | 48.7°F | 61.7°F | 2.21 in | — | 12 |
| July | 86.1°F | 55.1°F | 70.6°F | 1.06 in | — | 8 |
| August | 84.6°F | 52.9°F | 68.8°F | 1.04 in | 0.3 in | 6 |
| September | 73.3°F | 44.6°F | 58.9°F | 0.96 in | 0.2 in | 6 |
| October | 57.6°F | 33.5°F | 45.5°F | 0.78 in | 2.8 in | 7 |
| November | 42.8°F | 22.8°F | 32.8°F | 0.59 in | 5.4 in | 7 |
| December | 32.6°F | 14.2°F | 23.4°F | 0.46 in | 7.7 in | 7 |
Climate twins of East Helena
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).