| 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 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 47b - Des Moines Lobe |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 50423 - Britt, IA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 10 | 23 | 35 | 48 | 58 | 61 | 59 | 49 | 38 | 24 | 10 | 35 |
| Avg Max Temp (°F) | 22 | 28 | 41 | 56 | 70 | 80 | 82 | 79 | 72 | 60 | 41 | 26 | 55 |
| Avg Precip (In.) | .94 | .9 | 1.93 | 3.2 | 3.81 | 4.75 | 4.26 | 3.91 | 3.01 | 2.13 | 1.87 | 1.05 | 31.75 |