|
Typical St. Louis September Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 81.0 °F | |
| Average daily low | 61.3 °F | |
| Average monthly precipitation | 3.0 inches | |
| Average monthly snow | none | |
| Daily chance of precipitation | 24.3% | |
| Daily chance of snow | 0% | |
|
St. Louis September Weather Records 1893–2024 |
||
|---|---|---|
| Highest temperature | 104 °F | September 1, 2011 |
| Lowest temperature | 32 °F | September 28, 1942 |
| Highest daily low | 83 °F | September 6, 1899 |
| Lowest daily high | 51 °F | September 29, 1945 |
| Hottest average high temperature | 88.9 °F | 1897 |
| Coldest average high temperature | 71.6 °F | 1918 |
| Most daily precipitation | 4.6 inches | September 13, 1945 |
| Most monthly precipitation | 10.0 inches | 1945 |
| Most daily snow | none | - |
| Most monthly snow | none | - |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| September 1 | 85.8 | 66.8 | 104 | 49 |
| September 2 | 85.4 | 66.5 | 101 | 50 |
| September 3 | 85.2 | 66.2 | 101 | 45 |
| September 4 | 85.0 | 65.9 | 104 | 42 |
| September 5 | 84.8 | 65.7 | 103 | 47 |
| September 6 | 84.5 | 65.4 | 102 | 48 |
| September 7 | 84.1 | 65.0 | 101 | 46 |
| September 8 | 83.8 | 64.7 | 101 | 42 |
| September 9 | 83.4 | 64.2 | 101 | 48 |
| September 10 | 83.0 | 63.8 | 99 | 46 |
| September 11 | 82.6 | 63.3 | 98 | 42 |
| September 12 | 82.1 | 62.9 | 98 | 44 |
| September 13 | 81.8 | 62.4 | 100 | 43 |
| September 14 | 81.4 | 62.0 | 101 | 46 |
| September 15 | 81.1 | 61.5 | 101 | 45 |
| September 16 | 80.8 | 61.1 | 98 | 44 |
| September 17 | 80.5 | 60.7 | 96 | 45 |
| September 18 | 80.2 | 60.3 | 97 | 42 |
| September 19 | 79.8 | 60.0 | 96 | 43 |
| September 20 | 79.5 | 59.6 | 97 | 41 |
| September 21 | 79.1 | 59.2 | 96 | 40 |
| September 22 | 78.7 | 58.8 | 95 | 40 |
| September 23 | 78.4 | 58.4 | 93 | 36 |
| September 24 | 78.0 | 58.0 | 93 | 37 |
| September 25 | 77.7 | 57.5 | 92 | 39 |
| September 26 | 77.2 | 57.2 | 94 | 35 |
| September 27 | 76.8 | 56.7 | 92 | 36 |
| September 28 | 76.4 | 56.3 | 97 | 32 |
| September 29 | 76.0 | 56.0 | 102 | 36 |
| September 30 | 75.7 | 55.6 | 93 | 36 |