| 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: | 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 98354 - Milton, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 34 | 35 | 37 | 40 | 45 | 49 | 53 | 53 | 49 | 43 | 38 | 34 | 43 |
| Avg Max Temp (°F) | 46 | 51 | 55 | 60 | 66 | 71 | 77 | 77 | 72 | 61 | 51 | 46 | 61 |
| Avg Precip (In.) | 5.46 | 4.55 | 4.09 | 2.91 | 1.97 | 1.6 | .82 | 1.17 | 1.73 | 3.35 | 6.01 | 5.98 | 39.64 |