|
Typical Waterloo September Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 75.7 °F | |
| Average daily low | 51.1 °F | |
| Average monthly precipitation | 3.1 inches | |
| Average monthly snow | none | |
| Daily chance of precipitation | 28.9% | |
| Daily chance of snow | 0% | |
|
Waterloo September Weather Records 1895–2024 |
||
|---|---|---|
| Highest temperature | 102 °F | September 7, 1939 |
| Lowest temperature | 19 °F | September 30, 1899 |
| Highest daily low | 77 °F | September 7, 1939 |
| Lowest daily high | 42 °F | September 26, 1942 |
| Hottest average high temperature | 84.7 °F | 1897 |
| Coldest average high temperature | 67.8 °F | 1965 |
| Most daily precipitation | 4.5 inches | September 19, 1919 |
| Most monthly precipitation | 13.4 inches | 2018 |
| Most daily snow | none | - |
| Most monthly snow | none | - |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| September 1 | 79.9 | 56.5 | 97 | 36 |
| September 2 | 79.8 | 56.3 | 100 | 38 |
| September 3 | 79.6 | 56.0 | 101 | 36 |
| September 4 | 79.4 | 55.8 | 101 | 34 |
| September 5 | 79.2 | 55.5 | 98 | 37 |
| September 6 | 79.0 | 55.2 | 102 | 35 |
| September 7 | 78.6 | 54.8 | 102 | 37 |
| September 8 | 78.2 | 54.4 | 99 | 35 |
| September 9 | 77.8 | 53.9 | 99 | 35 |
| September 10 | 77.5 | 53.5 | 98 | 35 |
| September 11 | 77.1 | 53.0 | 98 | 32 |
| September 12 | 76.8 | 52.6 | 97 | 32 |
| September 13 | 76.5 | 52.2 | 97 | 31 |
| September 14 | 76.1 | 51.7 | 98 | 30 |
| September 15 | 75.8 | 51.3 | 100 | 30 |
| September 16 | 75.5 | 50.9 | 97 | 31 |
| September 17 | 75.1 | 50.5 | 95 | 32 |
| September 18 | 74.7 | 50.1 | 93 | 28 |
| September 19 | 74.3 | 49.8 | 95 | 32 |
| September 20 | 73.8 | 49.4 | 96 | 27 |
| September 21 | 73.4 | 48.9 | 94 | 27 |
| September 22 | 73.0 | 48.5 | 94 | 26 |
| September 23 | 72.7 | 48.2 | 92 | 28 |
| September 24 | 72.5 | 47.8 | 91 | 29 |
| September 25 | 72.1 | 47.4 | 92 | 27 |
| September 26 | 71.6 | 46.9 | 88 | 26 |
| September 27 | 71.2 | 46.5 | 89 | 28 |
| September 28 | 70.8 | 46.1 | 91 | 21 |
| September 29 | 70.3 | 45.7 | 93 | 22 |
| September 30 | 69.8 | 45.3 | 94 | 19 |