| 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. 1 - Oct. 10 |
| Average Last Frost Date: | May 1 - May 10 |
| 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 83660 - Parma, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 25 | 31 | 37 | 45 | 51 | 56 | 54 | 45 | 35 | 28 | 21 | 37 |
| Avg Max Temp (°F) | 36 | 45 | 56 | 65 | 74 | 82 | 91 | 91 | 80 | 67 | 49 | 37 | 64 |
| Avg Precip (In.) | 1.34 | 1.03 | 1.2 | .93 | 1.11 | .81 | .35 | .39 | .61 | .67 | 1.19 | 1.27 | 10.9 |