| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 47b - Des Moines Lobe | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 50595 - Webster City, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 6 | 12 | 24 | 35 | 48 | 58 | 62 | 59 | 49 | 38 | 24 | 12 | 36 |
| Avg Max Temp (°F) | 26 | 32 | 45 | 60 | 72 | 81 | 84 | 82 | 75 | 63 | 44 | 30 | 58 |
| Avg Precip (In.) | .83 | .85 | 1.94 | 3.13 | 4.11 | 5.14 | 4.3 | 4.51 | 3.1 | 2.49 | 1.86 | 1.14 | 33.41 |