|
Typical Mason City September Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 74.3 °F | |
| Average daily low | 49.1 °F | |
| Average monthly precipitation | 3.4 inches | |
| Average monthly snow | none | |
| Daily chance of precipitation | 29.9% | |
| Daily chance of snow | 0% | |
|
Mason City September Weather Records 1893–2024 |
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|---|---|---|
| Highest temperature | 103 °F | September 6, 1922 |
| Lowest temperature | 15 °F | September 30, 1899 |
| Highest daily low | 74 °F | September 10, 1931 |
| Lowest daily high | 40 °F | September 26, 1942 |
| Hottest average high temperature | 81.4 °F | 1897 |
| Coldest average high temperature | 66.0 °F | 1993 |
| Most daily precipitation | 5.2 inches | September 12, 1978 |
| Most monthly precipitation | 14.4 inches | 1965 |
| Most daily snow | 4.0 inches | September 26, 1942 |
| Most monthly snow | 4.0 inches | 1942 |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| September 1 | 78.7 | 54.5 | 97 | 35 |
| September 2 | 78.5 | 54.2 | 99 | 34 |
| September 3 | 78.4 | 54.0 | 98 | 34 |
| September 4 | 78.2 | 53.8 | 100 | 37 |
| September 5 | 77.9 | 53.5 | 100 | 36 |
| September 6 | 77.7 | 53.2 | 103 | 37 |
| September 7 | 77.3 | 52.8 | 98 | 36 |
| September 8 | 76.9 | 52.4 | 96 | 37 |
| September 9 | 76.5 | 51.9 | 99 | 34 |
| September 10 | 76.1 | 51.5 | 98 | 35 |
| September 11 | 75.7 | 51.0 | 95 | 31 |
| September 12 | 75.4 | 50.6 | 95 | 33 |
| September 13 | 75.1 | 50.2 | 95 | 31 |
| September 14 | 74.7 | 49.7 | 95 | 28 |
| September 15 | 74.4 | 49.3 | 95 | 26 |
| September 16 | 74.1 | 48.9 | 94 | 30 |
| September 17 | 73.7 | 48.5 | 94 | 31 |
| September 18 | 73.3 | 48.1 | 92 | 26 |
| September 19 | 72.9 | 47.7 | 95 | 25 |
| September 20 | 72.4 | 47.2 | 92 | 28 |
| September 21 | 71.9 | 46.8 | 93 | 29 |
| September 22 | 71.5 | 46.4 | 94 | 25 |
| September 23 | 71.2 | 46.1 | 90 | 28 |
| September 24 | 70.9 | 45.8 | 90 | 29 |
| September 25 | 70.6 | 45.4 | 88 | 26 |
| September 26 | 70.1 | 44.9 | 89 | 25 |
| September 27 | 69.7 | 44.5 | 86 | 22 |
| September 28 | 69.2 | 44.1 | 89 | 20 |
| September 29 | 68.8 | 43.6 | 88 | 24 |
| September 30 | 68.2 | 43.2 | 92 | 15 |