|
Typical Missoula September Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 73.3 °F | |
| Average daily low | 42.4 °F | |
| Average monthly precipitation | 1.0 inches | |
| Average monthly snow | 0.1 inches | |
| Daily chance of precipitation | 24.4% | |
| Daily chance of snow | 0.11% | |
|
Missoula September Weather Records 1893–2024 |
||
|---|---|---|
| Highest temperature | 99 °F | September 1, 1967 |
| Lowest temperature | 15 °F | September 25, 1926 |
| Highest daily low | 63 °F | September 5, 2013 |
| Lowest daily high | 35 °F | September 24, 1934 |
| Hottest average high temperature | 81.9 °F | 1938 |
| Coldest average high temperature | 58.4 °F | 1965 |
| Most daily precipitation | 1.5 inches | September 9, 1931 |
| Most monthly precipitation | 3.7 inches | 1908 |
| Most daily snow | 1.7 inches | September 29, 2019 |
| Most monthly snow | 1.7 inches | 2019 |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| September 1 | 79.6 | 46.4 | 99 | 33 |
| September 2 | 79.2 | 46.1 | 97 | 34 |
| September 3 | 78.6 | 45.9 | 98 | 31 |
| September 4 | 78.1 | 45.7 | 95 | 31 |
| September 5 | 77.5 | 45.4 | 96 | 34 |
| September 6 | 77.1 | 45.1 | 93 | 29 |
| September 7 | 76.6 | 44.7 | 95 | 28 |
| September 8 | 76.2 | 44.4 | 92 | 30 |
| September 9 | 75.8 | 44.2 | 92 | 28 |
| September 10 | 75.3 | 43.9 | 92 | 28 |
| September 11 | 74.9 | 43.6 | 92 | 30 |
| September 12 | 74.5 | 43.3 | 91 | 25 |
| September 13 | 74.1 | 43.0 | 89 | 27 |
| September 14 | 73.7 | 42.7 | 90 | 20 |
| September 15 | 73.4 | 42.5 | 90 | 22 |
| September 16 | 73.1 | 42.2 | 91 | 27 |
| September 17 | 72.6 | 42.0 | 91 | 24 |
| September 18 | 72.1 | 41.7 | 92 | 24 |
| September 19 | 71.5 | 41.4 | 89 | 23 |
| September 20 | 70.9 | 41.1 | 91 | 24 |
| September 21 | 70.4 | 40.7 | 92 | 23 |
| September 22 | 70.0 | 40.4 | 91 | 25 |
| September 23 | 69.5 | 40.1 | 91 | 20 |
| September 24 | 69.1 | 39.8 | 92 | 17 |
| September 25 | 68.6 | 39.4 | 88 | 15 |
| September 26 | 68.0 | 39.0 | 87 | 21 |
| September 27 | 67.3 | 38.7 | 89 | 24 |
| September 28 | 66.7 | 38.3 | 88 | 22 |
| September 29 | 66.1 | 38.0 | 87 | 20 |
| September 30 | 65.6 | 37.7 | 88 | 20 |