| 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 8a: 10F to 15F | |
| Average First Frost Date: | October 21 - 31 | |
| Average Last Frost Date: | April 11 - 20 | |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate | |
| Ecoregion: | 3c - Prairie Terraces | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97071 - Woodburn, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 34 | 36 | 38 | 41 | 45 | 50 | 53 | 54 | 50 | 43 | 39 | 34 | 43 |
| Avg Max Temp (°F) | 47 | 51 | 56 | 61 | 68 | 74 | 81 | 82 | 77 | 65 | 53 | 46 | 63 |
| Avg Precip (In.) | 6.08 | 4.98 | 4.43 | 3.09 | 2.47 | 1.65 | .59 | .83 | 1.58 | 3.44 | 6.25 | 6.62 | 42.02 |