| 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 Zone 7a: 0°F to 5°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: | 11n - Deschutes River Valley |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 97753 - Powell Butte, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 25 | 26 | 29 | 35 | 41 | 45 | 45 | 38 | 32 | 27 | 22 | 32 |
| Avg Max Temp (°F) | 41 | 46 | 52 | 59 | 66 | 75 | 84 | 83 | 75 | 64 | 48 | 41 | 61 |
| Avg Precip (In.) | 1.12 | .89 | .92 | .79 | .99 | .78 | .56 | .55 | .4 | .72 | 1.34 | 1.15 | 10.22 |