US Geography / US Weather / Iowa Weather / Denison |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 27° | 32° | 44° | 60° | 71° | 80° | 84° | 81° | 74° | 62° | 45° | 30° |
| Avg. Low | 8° | 14° | 25° | 37° | 48° | 58° | 64° | 60° | 51° | 40° | 26° | 14° |
| Mean | 18° | 24° | 35° | 48° | 60° | 70° | 74° | 71° | 64° | 51° | 36° | 22° |
| Avg. Precip. | 0.7 in | 0.8 in | 2.0 in | 2.7 in | 4.3 in | 4.3 in | 3.4 in | 3.6 in | 3.8 in | 2.3 in | 1.3 in | 1.0 in |
Degrees in Fahrenheit
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