|
Typical Janesville September Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 75.1 °F | |
| Average daily low | 50.8 °F | |
| Average monthly precipitation | 3.7 inches | |
| Average monthly snow | none | |
| Daily chance of precipitation | 33.8% | |
| Daily chance of snow | 0% | |
|
Janesville September Weather Records 1893–2024 |
||
|---|---|---|
| Highest temperature | 101 °F | September 1, 1953 |
| Lowest temperature | 27 °F | September 23, 1974 |
| Highest daily low | 75 °F | September 19, 1895 |
| Lowest daily high | 44 °F | September 22, 1995 |
| Hottest average high temperature | 81.3 °F | 1978 |
| Coldest average high temperature | 66.1 °F | 1993 |
| Most daily precipitation | 4.5 inches | September 13, 1961 |
| Most monthly precipitation | 11.6 inches | 2019 |
| Most daily snow | none | - |
| Most monthly snow | none | - |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| September 1 | 79.6 | 56.1 | 101 | 40 |
| September 2 | 79.3 | 55.8 | 100 | 37 |
| September 3 | 79.2 | 55.5 | 94 | 42 |
| September 4 | 79.1 | 55.2 | 94 | 39 |
| September 5 | 78.9 | 55.0 | 96 | 38 |
| September 6 | 78.6 | 54.7 | 95 | 39 |
| September 7 | 78.3 | 54.4 | 97 | 35 |
| September 8 | 78.0 | 54.1 | 99 | 40 |
| September 9 | 77.6 | 53.6 | 96 | 41 |
| September 10 | 77.2 | 53.2 | 94 | 37 |
| September 11 | 76.8 | 52.8 | 95 | 32 |
| September 12 | 76.5 | 52.3 | 91 | 33 |
| September 13 | 76.2 | 51.9 | 91 | 35 |
| September 14 | 75.7 | 51.5 | 93 | 37 |
| September 15 | 75.3 | 51.1 | 89 | 34 |
| September 16 | 74.9 | 50.7 | 90 | 27 |
| September 17 | 74.5 | 50.3 | 91 | 35 |
| September 18 | 74.1 | 49.9 | 92 | 31 |
| September 19 | 73.6 | 49.5 | 93 | 36 |
| September 20 | 73.1 | 49.2 | 92 | 29 |
| September 21 | 72.6 | 48.7 | 93 | 32 |
| September 22 | 72.1 | 48.2 | 92 | 32 |
| September 23 | 71.7 | 47.9 | 95 | 27 |
| September 24 | 71.5 | 47.5 | 95 | 29 |
| September 25 | 71.2 | 47.1 | 93 | 32 |
| September 26 | 70.9 | 46.7 | 94 | 30 |
| September 27 | 70.6 | 46.3 | 90 | 29 |
| September 28 | 70.2 | 45.9 | 89 | 30 |
| September 29 | 69.8 | 45.5 | 94 | 29 |
| September 30 | 69.4 | 45.1 | 91 | 28 |