| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Aug. 1 - Aug. 10 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 11k - Blue Mountain Basins |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 97846 - Joseph, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 18 | 21 | 26 | 33 | 37 | 42 | 43 | 36 | 28 | 22 | 16 | 28 |
| Avg Max Temp (°F) | 33 | 38 | 44 | 49 | 58 | 65 | 74 | 77 | 68 | 55 | 42 | 34 | 53 |
| Avg Precip (In.) | 1.38 | 1.6 | 1.6 | 2.11 | 2.97 | 2.63 | .97 | 1.12 | 1.07 | 1.85 | 1.91 | 1.43 | 20.66 |