|
Typical Helena December Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 32.7 °F | |
| Average daily low | 13.9 °F | |
| Average monthly precipitation | 0.4 inches | |
| Average monthly snow | 7.2 inches | |
| Daily chance of precipitation | 21.3% | |
| Daily chance of snow | 17.4% | |
|
Helena December Weather Records 1893–2024 |
||
|---|---|---|
| Highest temperature | 70 °F | December 1, 2021 |
| Lowest temperature | -38 °F | December 17, 1964 |
| Highest daily low | 51 °F | December 1, 2021 |
| Lowest daily high | -24 °F | December 16, 1924 |
| Hottest average high temperature | 42.4 °F | 1939 |
| Coldest average high temperature | 14.9 °F | 1983 |
| Most daily precipitation | 0.8 inches | December 6, 1901 |
| Most monthly precipitation | 3.3 inches | 1917 |
| Most daily snow | 11.0 inches | December 12, 1917 |
| Most monthly snow | 31.9 inches | 1929 |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| December 1 | 36.7 | 17.5 | 70 | -25 |
| December 2 | 36.4 | 17.2 | 64 | -25 |
| December 3 | 36.0 | 16.9 | 62 | -16 |
| December 4 | 35.8 | 16.6 | 64 | -24 |
| December 5 | 35.4 | 16.3 | 64 | -28 |
| December 6 | 35.2 | 16.2 | 61 | -30 |
| December 7 | 35.0 | 16.1 | 52 | -28 |
| December 8 | 34.8 | 15.8 | 62 | -35 |
| December 9 | 34.4 | 15.4 | 59 | -30 |
| December 10 | 34.1 | 15.1 | 65 | -27 |
| December 11 | 33.8 | 14.9 | 59 | -22 |
| December 12 | 33.6 | 14.7 | 62 | -23 |
| December 13 | 33.4 | 14.5 | 58 | -22 |
| December 14 | 33.3 | 14.3 | 63 | -20 |
| December 15 | 33.0 | 14.1 | 57 | -25 |
| December 16 | 32.7 | 13.8 | 60 | -36 |
| December 17 | 32.4 | 13.6 | 58 | -38 |
| December 18 | 32.1 | 13.3 | 59 | -30 |
| December 19 | 32.0 | 13.1 | 59 | -30 |
| December 20 | 31.8 | 12.9 | 55 | -25 |
| December 21 | 31.7 | 12.8 | 60 | -32 |
| December 22 | 31.7 | 12.7 | 58 | -35 |
| December 23 | 31.6 | 12.6 | 54 | -32 |
| December 24 | 31.5 | 12.7 | 57 | -37 |
| December 25 | 31.4 | 12.6 | 53 | -26 |
| December 26 | 31.2 | 12.5 | 61 | -27 |
| December 27 | 31.1 | 12.3 | 64 | -20 |
| December 28 | 30.8 | 12.1 | 55 | -25 |
| December 29 | 30.7 | 11.8 | 55 | -29 |
| December 30 | 30.5 | 11.7 | 54 | -37 |
| December 31 | 30.4 | 11.6 | 56 | -34 |