| 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 |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Apr. 1 - Apr. 10 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 78c - Umpqua Interior Foothills |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97499 - Yoncalla, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 34 | 35 | 37 | 39 | 43 | 48 | 51 | 51 | 47 | 42 | 38 | 34 | 42 |
| Avg Max Temp (°F) | 48 | 53 | 58 | 62 | 68 | 74 | 82 | 83 | 78 | 67 | 54 | 48 | 65 |
| Avg Precip (In.) | 5.7 | 5.33 | 4.37 | 3.41 | 2.45 | 1.29 | .59 | .73 | 1.34 | 2.77 | 7.14 | 6.72 | 41.84 |