|
Typical Great Falls May Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 64.6 °F | |
| Average daily low | 39.0 °F | |
| Average monthly precipitation | 2.4 inches | |
| Average monthly snow | 1.9 inches | |
| Daily chance of precipitation | 36.5% | |
| Daily chance of snow | 4.7% | |
|
Great Falls May Weather Records 1892–2024 |
||
|---|---|---|
| Highest temperature | 100 °F | May 28, 1919 |
| Lowest temperature | 12 °F | May 1, 2009 |
| Highest daily low | 66 °F | May 31, 1936 |
| Lowest daily high | 28 °F | May 1, 1954 |
| Hottest average high temperature | 79.2 °F | 1936 |
| Coldest average high temperature | 57.0 °F | 1927 |
| Most daily precipitation | 2.8 inches | May 15, 1902 |
| Most monthly precipitation | 8.1 inches | 1953 |
| Most daily snow | 9.9 inches | May 29, 1989 |
| Most monthly snow | 11.6 inches | 1989 |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| May 1 | 60.3 | 34.5 | 83 | 12 |
| May 2 | 60.6 | 34.8 | 86 | 16 |
| May 3 | 61.0 | 35.1 | 86 | 19 |
| May 4 | 61.3 | 35.5 | 87 | 23 |
| May 5 | 61.5 | 35.8 | 88 | 26 |
| May 6 | 61.8 | 36.0 | 88 | 23 |
| May 7 | 61.8 | 36.3 | 86 | 24 |
| May 8 | 62.1 | 36.6 | 88 | 21 |
| May 9 | 62.3 | 36.8 | 85 | 24 |
| May 10 | 62.6 | 37.1 | 88 | 21 |
| May 11 | 62.9 | 37.3 | 88 | 23 |
| May 12 | 63.2 | 37.7 | 90 | 22 |
| May 13 | 63.5 | 38.0 | 89 | 20 |
| May 14 | 63.9 | 38.3 | 95 | 26 |
| May 15 | 64.3 | 38.7 | 93 | 28 |
| May 16 | 64.6 | 39.1 | 92 | 30 |
| May 17 | 64.9 | 39.4 | 87 | 26 |
| May 18 | 65.2 | 39.8 | 90 | 27 |
| May 19 | 65.5 | 40.1 | 94 | 30 |
| May 20 | 65.7 | 40.4 | 94 | 26 |
| May 21 | 66.1 | 40.7 | 93 | 24 |
| May 22 | 66.4 | 41.0 | 97 | 26 |
| May 23 | 66.7 | 41.3 | 88 | 30 |
| May 24 | 67.0 | 41.6 | 90 | 30 |
| May 25 | 67.3 | 41.9 | 94 | 31 |
| May 26 | 67.6 | 42.3 | 94 | 30 |
| May 27 | 67.7 | 42.5 | 95 | 28 |
| May 28 | 67.9 | 42.8 | 100 | 27 |
| May 29 | 68.0 | 43.0 | 95 | 31 |
| May 30 | 68.2 | 43.2 | 93 | 31 |
| May 31 | 68.3 | 43.3 | 90 | 28 |