| 2023 Hardiness Zone: | 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: | Nov. 11 - Nov. 20 | |
| Average Last Frost Date: | Mar. 21 - Mar. 31 | |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate | |
| Ecoregion: | 2f - Central Puget Lowland | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 98178 - Seattle, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 35 | 37 | 39 | 42 | 47 | 51 | 55 | 55 | 51 | 45 | 39 | 35 | 44 |
| Avg Max Temp (°F) | 46 | 50 | 54 | 59 | 66 | 70 | 76 | 77 | 71 | 61 | 51 | 46 | 61 |
| Avg Precip (In.) | 5.15 | 4.24 | 3.78 | 2.64 | 1.84 | 1.56 | .85 | 1.08 | 1.71 | 3.21 | 5.84 | 5.66 | 37.57 |