| 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: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate |
| Ecoregion: | 11n - Deschutes River Valley |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 97760 - Terrebonne, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 26 | 28 | 30 | 36 | 42 | 46 | 46 | 39 | 33 | 28 | 23 | 33 |
| Avg Max Temp (°F) | 42 | 47 | 54 | 60 | 68 | 76 | 85 | 85 | 77 | 65 | 50 | 42 | 63 |
| Avg Precip (In.) | .99 | .71 | .81 | .71 | .96 | .68 | .55 | .54 | .39 | .59 | 1.02 | .96 | 8.89 |