| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°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: | 1a - Coastal Lowlands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97146 - Warrenton, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 36 | 37 | 38 | 40 | 45 | 49 | 52 | 52 | 49 | 44 | 40 | 37 | 43 |
| Avg Max Temp (°F) | 48 | 51 | 53 | 56 | 60 | 64 | 67 | 69 | 68 | 61 | 53 | 48 | 58 |
| Avg Precip (In.) | 11.16 | 9.43 | 8.54 | 5.39 | 3.3 | 2.93 | 1.31 | 1.41 | 3.04 | 6.66 | 11.47 | 12.18 | 76.82 |