| 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: | 2d - Olympic Rainshadow | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 98239 - Coupeville, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 35 | 36 | 38 | 41 | 45 | 49 | 51 | 52 | 48 | 43 | 39 | 36 | 43 |
| Avg Max Temp (°F) | 46 | 49 | 52 | 57 | 63 | 67 | 71 | 72 | 68 | 58 | 50 | 45 | 58 |
| Avg Precip (In.) | 2.72 | 2 | 2.07 | 1.77 | 1.79 | 1.4 | 1.01 | .98 | 1.28 | 1.82 | 3.11 | 2.91 | 22.86 |