| 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. 11 - Oct. 20 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 40a - Loess Flats and Till Plains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 52544 - Centerville, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 17 | 28 | 39 | 50 | 60 | 65 | 63 | 53 | 42 | 29 | 17 | 39 |
| Avg Max Temp (°F) | 31 | 37 | 49 | 62 | 72 | 82 | 86 | 84 | 76 | 65 | 48 | 35 | 61 |
| Avg Precip (In.) | .95 | 1.01 | 2.29 | 3.48 | 4.73 | 4.48 | 4.98 | 4.07 | 3.99 | 2.89 | 2.37 | 1.32 | 36.56 |