| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate |
| Ecoregion: | 12h - Mountain Home Uplands |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 83627 - Hammett, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 21 | 24 | 30 | 35 | 43 | 50 | 56 | 54 | 45 | 35 | 26 | 20 | 37 |
| Avg Max Temp (°F) | 38 | 46 | 55 | 64 | 73 | 83 | 92 | 92 | 81 | 67 | 49 | 39 | 65 |
| Avg Precip (In.) | 1.33 | .97 | 1.13 | .85 | .86 | .62 | .33 | .25 | .59 | .72 | 1.28 | 1.25 | 10.19 |