US Geography / US Weather / Iowa Weather / Mason City |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 22 | 27 | 40 | 57 | 70 | 78 | 84 | 80 | 72 | 60 | 42 | 26 |
| Avg. Low | 4 | 8 | 22 | 35 | 46 | 56 | 61 | 58 | 48 | 37 | 24 | 10 |
| Mean | 14 | 18 | 31 | 46 | 58 | 68 | 74 | 70 | 61 | 48 | 34 | 18 |
| Avg. Precip. | 0.9 in | 0.9 in | 2.0 in | 3.0 in | 4.1 in | 4.5 in | 4.3 in | 4.1 in | 3.8 in | 2.4 in | 1.6 in | 1.3 in |
Degrees in Fahrenheit
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