| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate |
| Ecoregion: | 12i - Magic Valley |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 83328 - Filer, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 24 | 29 | 34 | 42 | 49 | 55 | 54 | 45 | 35 | 27 | 20 | 36 |
| Avg Max Temp (°F) | 36 | 42 | 51 | 60 | 70 | 78 | 87 | 87 | 76 | 63 | 47 | 37 | 61 |
| Avg Precip (In.) | 1.16 | .83 | 1.05 | .86 | 1.13 | .79 | .27 | .31 | .54 | .72 | 1.09 | .98 | 9.73 |