|
Typical Mason City December Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 29.9 °F | |
| Average daily low | 13.8 °F | |
| Average monthly precipitation | 1.3 inches | |
| Average monthly snow | 9.3 inches | |
| Daily chance of precipitation | 27.2% | |
| Daily chance of snow | 22.8% | |
|
Mason City December Weather Records 1893–2024 |
||
|---|---|---|
| Highest temperature | 69 °F | December 15, 2021 |
| Lowest temperature | -26 °F | December 19, 1983 |
| Highest daily low | 52 °F | December 2, 1962 |
| Lowest daily high | -20 °F | December 23, 1983 |
| Hottest average high temperature | 40.3 °F | 1923 |
| Coldest average high temperature | 10.7 °F | 1983 |
| Most daily precipitation | 1.6 inches | December 27, 1982 |
| Most monthly precipitation | 4.0 inches | 1982 |
| Most daily snow | 11.0 inches | December 10, 1970 |
| Most monthly snow | 27.6 inches | 1969 |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| December 1 | 35.8 | 18.6 | 67 | -3 |
| December 2 | 35.3 | 18.2 | 64 | -16 |
| December 3 | 34.7 | 17.7 | 63 | -16 |
| December 4 | 34.3 | 17.3 | 66 | -9 |
| December 5 | 33.8 | 16.9 | 62 | -7 |
| December 6 | 33.4 | 16.6 | 62 | -15 |
| December 7 | 33.0 | 16.3 | 55 | -18 |
| December 8 | 32.6 | 15.9 | 65 | -16 |
| December 9 | 32.1 | 15.6 | 63 | -19 |
| December 10 | 31.7 | 15.2 | 59 | -23 |
| December 11 | 31.3 | 14.9 | 57 | -17 |
| December 12 | 31.0 | 14.7 | 58 | -16 |
| December 13 | 30.7 | 14.5 | 56 | -22 |
| December 14 | 30.5 | 14.3 | 55 | -17 |
| December 15 | 30.2 | 14.0 | 69 | -20 |
| December 16 | 29.9 | 13.8 | 61 | -21 |
| December 17 | 29.4 | 13.5 | 57 | -18 |
| December 18 | 29.0 | 13.2 | 61 | -26 |
| December 19 | 28.7 | 12.9 | 48 | -26 |
| December 20 | 28.6 | 12.7 | 50 | -25 |
| December 21 | 28.4 | 12.5 | 55 | -23 |
| December 22 | 28.2 | 12.3 | 55 | -22 |
| December 23 | 27.9 | 12.0 | 50 | -25 |
| December 24 | 27.6 | 11.8 | 53 | -24 |
| December 25 | 27.5 | 11.6 | 52 | -21 |
| December 26 | 27.3 | 11.4 | 55 | -26 |
| December 27 | 27.2 | 11.3 | 52 | -26 |
| December 28 | 27.0 | 11.1 | 56 | -21 |
| December 29 | 26.7 | 10.9 | 47 | -21 |
| December 30 | 26.5 | 10.5 | 54 | -20 |
| December 31 | 26.2 | 10.2 | 52 | -22 |