US Geography / US Weather / Iowa Weather / Ottumwa |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 28 | 34 | 47 | 61 | 74 | 82 | 86 | 84 | 75 | 64 | 48 | 34 |
| Avg. Low | 12 | 17 | 28 | 41 | 52 | 61 | 66 | 64 | 55 | 44 | 31 | 17 |
| Mean | 21 | 26 | 38 | 51 | 64 | 72 | 77 | 74 | 66 | 54 | 40 | 26 |
| Avg. Precip. | 1.0 in | 0.9 in | 2.3 in | 3.3 in | 4.0 in | 3.8 in | 4.4 in | 3.9 in | 4.3 in | 2.7 in | 2.3 in | 1.4 in |
Degrees in Fahrenheit
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