| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°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 | |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 11 - Apr. 20 | |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate | |
| Ecoregion: | 2a - Fraser Lowland | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 98226 - Bellingham, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 31 | 34 | 36 | 39 | 44 | 49 | 52 | 52 | 47 | 41 | 36 | 32 | 41 |
| Avg Max Temp (°F) | 44 | 49 | 53 | 58 | 64 | 68 | 73 | 74 | 69 | 60 | 50 | 45 | 59 |
| Avg Precip (In.) | 5.01 | 3.82 | 3.39 | 2.95 | 2.49 | 2.09 | 1.46 | 1.36 | 1.86 | 3.56 | 5.76 | 5.28 | 39.04 |