| 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 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: | 3d - Valley Foothills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97431 - Dexter, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 34 | 36 | 38 | 41 | 45 | 49 | 53 | 53 | 50 | 44 | 39 | 35 | 43 |
| Avg Max Temp (°F) | 47 | 51 | 56 | 60 | 66 | 72 | 80 | 81 | 75 | 65 | 53 | 47 | 63 |
| Avg Precip (In.) | 7.03 | 5.21 | 5.1 | 3.85 | 3.37 | 2.18 | .54 | .91 | 1.26 | 4.42 | 6.44 | 7.09 | 47.38 |