| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°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. 1 - Apr. 10 | |
| 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 98278 - Oak Harbor, 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.) | 2.97 | 2.18 | 2.13 | 1.81 | 1.76 | 1.44 | 1.02 | 1 | 1.3 | 1.94 | 3.37 | 3.18 | 24.12 |