| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F |
| Average First Frost Date: | Nov. 1 - Nov. 10 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 78c - Umpqua Interior Foothills |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 97496 - Winston, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 35 | 36 | 38 | 40 | 45 | 50 | 54 | 53 | 48 | 43 | 39 | 35 | 43 |
| Avg Max Temp (°F) | 49 | 54 | 59 | 64 | 70 | 77 | 85 | 85 | 80 | 68 | 55 | 48 | 66 |
| Avg Precip (In.) | 5.02 | 4.32 | 3.86 | 2.76 | 1.92 | 1.11 | .42 | .61 | 1.21 | 2.42 | 6.1 | 6.17 | 35.92 |