| 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 | |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F | |
| Average First Frost Date: | Nov. 1 - Nov. 10 | |
| 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 98225 - Bellingham, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 32 | 35 | 37 | 40 | 45 | 50 | 52 | 52 | 48 | 42 | 37 | 33 | 42 |
| Avg Max Temp (°F) | 45 | 49 | 53 | 58 | 64 | 68 | 72 | 73 | 69 | 59 | 51 | 45 | 59 |
| Avg Precip (In.) | 4.91 | 3.7 | 3.23 | 2.85 | 2.41 | 2.01 | 1.42 | 1.33 | 1.76 | 3.42 | 5.6 | 5.08 | 37.72 |