| 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: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 47f - Rolling Loess Prairies | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 50115 - Guthrie Center, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 8 | 14 | 26 | 37 | 49 | 58 | 63 | 60 | 51 | 38 | 26 | 14 | 37 |
| Avg Max Temp (°F) | 29 | 35 | 47 | 61 | 73 | 82 | 86 | 84 | 77 | 64 | 46 | 33 | 60 |
| Avg Precip (In.) | .88 | 1.01 | 2.34 | 3.39 | 4.44 | 4.76 | 4.39 | 4.3 | 3.41 | 2.53 | 1.99 | 1.2 | 34.63 |