| 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. 11 - Mar. 20 | |
| 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 98155 - Seattle, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 34 | 35 | 37 | 40 | 46 | 50 | 53 | 54 | 50 | 43 | 38 | 34 | 43 |
| Avg Max Temp (°F) | 46 | 50 | 54 | 59 | 65 | 70 | 76 | 76 | 71 | 61 | 51 | 46 | 60 |
| Avg Precip (In.) | 4.54 | 3.92 | 3.71 | 2.68 | 2.01 | 1.71 | .98 | .99 | 1.77 | 3.36 | 5.2 | 5.55 | 36.44 |