| 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: | Nov. 1 - Nov. 10 | |
| Average Last Frost Date: | Apr. 11 - Apr. 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 97115 - Dundee, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 33 | 35 | 37 | 40 | 44 | 49 | 53 | 53 | 49 | 43 | 38 | 34 | 42 |
| Avg Max Temp (°F) | 46 | 51 | 56 | 61 | 67 | 73 | 81 | 81 | 76 | 64 | 52 | 46 | 63 |
| Avg Precip (In.) | 5.81 | 5.18 | 4.46 | 2.8 | 2.37 | 1.58 | .61 | .79 | 1.68 | 3.08 | 6.09 | 6.34 | 40.8 |