| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F 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: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 50801 - Creston, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 16 | 27 | 37 | 50 | 59 | 64 | 62 | 52 | 41 | 27 | 15 | 38 |
| Avg Max Temp (°F) | 29 | 36 | 48 | 61 | 72 | 81 | 85 | 83 | 75 | 64 | 46 | 33 | 59 |
| Avg Precip (In.) | .83 | .98 | 2.13 | 3.4 | 4.56 | 4.34 | 4.45 | 3.81 | 3.96 | 2.62 | 2.26 | 1.01 | 34.36 |