| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 72d - Upper Mississippi Alluvial Plain |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 52653 - Wapello, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 19 | 29 | 40 | 51 | 61 | 65 | 63 | 54 | 43 | 31 | 19 | 41 |
| Avg Max Temp (°F) | 30 | 36 | 49 | 63 | 73 | 82 | 86 | 84 | 77 | 65 | 48 | 35 | 61 |
| Avg Precip (In.) | 1.23 | 1.29 | 2.56 | 3.46 | 4.15 | 3.93 | 4 | 3.97 | 3.58 | 2.67 | 2.44 | 1.82 | 35.1 |