| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Aug. 21 - Aug. 31 |
| Average Last Frost Date: | Jun. 11 - Jun. 20 |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer |
| Ecoregion: | 16g - High Glacial Drift-Filled Valleys |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 83615 - Donnelly, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 13 | 19 | 26 | 33 | 39 | 43 | 42 | 34 | 27 | 21 | 13 | 27 |
| Avg Max Temp (°F) | 30 | 35 | 42 | 50 | 60 | 69 | 80 | 80 | 70 | 57 | 39 | 30 | 54 |
| Avg Precip (In.) | 3.37 | 3.05 | 2.77 | 2.26 | 2.28 | 1.86 | .9 | .98 | 1.36 | 1.89 | 3.32 | 3.62 | 27.65 |