| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 3c - Prairie Terraces |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97378 - Sheridan, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 33 | 35 | 37 | 39 | 44 | 48 | 51 | 51 | 48 | 42 | 37 | 33 | 41 |
| Avg Max Temp (°F) | 46 | 50 | 56 | 61 | 68 | 74 | 81 | 82 | 77 | 65 | 52 | 45 | 63 |
| Avg Precip (In.) | 6.8 | 5.79 | 5.49 | 3.17 | 2.25 | 1.4 | .49 | .57 | 1.51 | 2.88 | 6.97 | 7.64 | 44.97 |