| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°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 Zone 7b: 5°F to 10°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 3b - Willamette River and Tributaries Gallery Forest |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97355 - Lebanon, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 34 | 35 | 37 | 39 | 44 | 48 | 51 | 51 | 48 | 42 | 38 | 34 | 42 |
| Avg Max Temp (°F) | 47 | 52 | 56 | 60 | 67 | 73 | 80 | 81 | 76 | 64 | 53 | 46 | 63 |
| Avg Precip (In.) | 6.14 | 5.46 | 4.87 | 3.49 | 2.79 | 1.96 | .63 | 1.01 | 1.56 | 3.56 | 6.81 | 6.76 | 45.04 |