| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 47b - Des Moines Lobe |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 50248 - Story City, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 13 | 25 | 36 | 48 | 58 | 63 | 60 | 51 | 39 | 26 | 13 | 37 |
| Avg Max Temp (°F) | 26 | 32 | 45 | 59 | 71 | 81 | 84 | 82 | 75 | 63 | 45 | 31 | 58 |
| Avg Precip (In.) | .91 | .94 | 2.04 | 3.24 | 4.14 | 5.41 | 4.41 | 4.42 | 3.08 | 2.55 | 1.94 | 1.15 | 34.21 |