| 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 |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Aug. 21 - Aug. 31 |
| Average Last Frost Date: | Jun. 11 - Jun. 20 |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate |
| Ecoregion: | 11a - John Day/Clarno Uplands |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 97750 - Mitchell, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 26 | 30 | 33 | 39 | 45 | 51 | 51 | 43 | 35 | 29 | 24 | 36 |
| Avg Max Temp (°F) | 41 | 46 | 53 | 59 | 67 | 76 | 85 | 85 | 76 | 64 | 48 | 41 | 62 |
| Avg Precip (In.) | 1.27 | .87 | 1.13 | 1.36 | 1.87 | 1.3 | .68 | .76 | .78 | 1.01 | 1.67 | 1.48 | 14.18 |