| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°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 Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 3a - Portland/Vancouver Basin |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 98671 - Washougal, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 33 | 35 | 37 | 40 | 45 | 50 | 53 | 53 | 48 | 43 | 38 | 34 | 42 |
| Avg Max Temp (°F) | 46 | 50 | 56 | 61 | 68 | 74 | 81 | 81 | 76 | 65 | 53 | 46 | 63 |
| Avg Precip (In.) | 6.15 | 5.21 | 4.43 | 3.61 | 2.73 | 2.13 | .88 | 1.14 | 1.96 | 3.41 | 6.44 | 6.67 | 44.74 |