| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F 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 6b: -5F to 0F |
| 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: | 12a - Treasure Valley |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 83641 - Melba, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 27 | 33 | 38 | 45 | 52 | 57 | 56 | 47 | 38 | 30 | 22 | 39 |
| Avg Max Temp (°F) | 37 | 46 | 57 | 65 | 73 | 82 | 90 | 89 | 79 | 67 | 49 | 38 | 65 |
| Avg Precip (In.) | 1.11 | .87 | 1.07 | .98 | 1.09 | .68 | .31 | .29 | .58 | .63 | 1.15 | 1.09 | 9.85 |