| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | Jun. 11 - Jun. 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 10j - Nez Perce Prairie |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 83522 - Cottonwood, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 25 | 28 | 33 | 39 | 45 | 49 | 48 | 41 | 34 | 28 | 22 | 34 |
| Avg Max Temp (°F) | 35 | 41 | 48 | 55 | 63 | 71 | 80 | 81 | 71 | 58 | 43 | 35 | 57 |
| Avg Precip (In.) | 1.71 | 1.36 | 1.89 | 2.28 | 3.03 | 2.36 | 1.34 | 1.05 | 1.3 | 1.45 | 1.9 | 1.65 | 21.31 |