WeatherWX.com
Helena Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 34°F Lo 20°F | Hi 37°F Lo 23°F | Hi 52°F Lo 36°F | Hi 62°F Lo 44°F | Hi 72°F Lo 55°F | Hi 82°F Lo 65°F | Hi 85°F Lo 67°F | Hi 84°F Lo 64°F | Hi 79°F Lo 58°F | Hi 65°F Lo 47°F | Hi 52°F Lo 36°F | Hi 39°F Lo 26°F |
| 10 mph | 10 mph | 10 mph | 10 mph | 9 mph | 8 mph | 7 mph | 7 mph | 8 mph | 9 mph | 10 mph | 9 mph |
| 1.8 in | 2 in | 4.4 in | 4.9 in | 7 in | 6.8 in | 6.5 in | 6.3 in | 4.9 in | 3.6 in | 2.4 in | 2.2 in |
| 76% | 74% | 72% | 71% | 78% | 79% | 78% | 77% | 73% | 68% | 69% | 73% |
| 45% | 45% | 47% | 41% | 41% | 28% | 25% | 26% | 26% | 31% | 31% | 40% |
| 30.2 in | 30.2 in | 30.0 in | 29.9 in | 29.9 in | 29.9 in | 29.9 in | 29.9 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 18 | 16 | 20 | 22 | 21 | 21 | 23 | 25 | 24 | 26 | 24 | 21 |
| 3 | 3 | 6 | 6 | 10 | 9 | 8 | 6 | 6 | 4 | 4 | 3 |
| 9 | 9 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 6 |
| 3 | 1 | 1 | 1 | 3 | 2 | 3 | 5 | 3 | 1 | 0 | 2 |
| 2 | 2 | 3 | 4 | 5 | 6 | 6 | 6 | 5 | 3 | 2 | 2 |
| 251 | 231 | 254 | 267 | 273 | 323 | 339 | 339 | 320 | 307 | 292 | 283 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 1°C Lo -7°C | Hi 3°C Lo -5°C | Hi 11°C Lo 2°C | Hi 17°C Lo 7°C | Hi 22°C Lo 13°C | Hi 28°C Lo 18°C | Hi 30°C Lo 19°C | Hi 29°C Lo 18°C | Hi 26°C Lo 15°C | Hi 18°C Lo 8°C | Hi 11°C Lo 2°C | Hi 4°C Lo -3°C |
| 16 km/h | 16 km/h | 17 km/h | 16 km/h | 14 km/h | 13 km/h | 11 km/h | 11 km/h | 13 km/h | 15 km/h | 16 km/h | 15 km/h |
| 46 mm | 52 mm | 112 mm | 123 mm | 179 mm | 173 mm | 166 mm | 159 mm | 125 mm | 92 mm | 61 mm | 56 mm |
| 76% | 74% | 72% | 71% | 78% | 79% | 78% | 77% | 73% | 68% | 69% | 73% |
| 45% | 45% | 47% | 41% | 41% | 28% | 25% | 26% | 26% | 31% | 31% | 40% |
| 1022 mb | 1021 mb | 1017 mb | 1013 mb | 1013 mb | 1012 mb | 1014 mb | 1014 mb | 1016 mb | 1016 mb | 1019 mb | 1020 mb |
| 18 | 16 | 20 | 22 | 21 | 21 | 23 | 25 | 24 | 26 | 24 | 21 |
| 3 | 3 | 6 | 6 | 10 | 9 | 8 | 6 | 6 | 4 | 4 | 3 |
| 9 | 9 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 6 |
| 3 | 1 | 1 | 1 | 3 | 2 | 3 | 5 | 3 | 1 | 0 | 2 |
| 2 | 2 | 3 | 4 | 5 | 6 | 6 | 6 | 5 | 3 | 2 | 2 |
| 251 | 231 | 254 | 267 | 273 | 323 | 339 | 339 | 320 | 307 | 292 | 283 |
| Month |
| Avg. Temperatures |
| Avg. Wind Speed |
| Avg. Precipitation |
| Average Humidity |
| Avg. Cloud Cover |
| Pressure Average |
| Average Dry Days |
| Avg. Precip. Days |
| Avg. Snow Days |
| Average Fog Days |
| Average UV Index |
| Avg. Hours of Sun |
Averages are based on historical weather data from the past 10 years.
