| 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: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 47f - Rolling Loess Prairies |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 52247 - Kalona, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 17 | 28 | 39 | 51 | 60 | 65 | 62 | 53 | 42 | 29 | 17 | 40 |
| Avg Max Temp (°F) | 29 | 35 | 48 | 62 | 73 | 82 | 86 | 84 | 76 | 65 | 47 | 34 | 60 |
| Avg Precip (In.) | 1.15 | 1.15 | 2.32 | 3.47 | 4.41 | 4.45 | 4.31 | 4.35 | 3.62 | 2.69 | 2.46 | 1.6 | 35.98 |