| 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: | Oct.21-Oct.31 |
| Average Last Frost Date: | Apr.21-Apr.30 |
| Koppen-Geiger Climate Zone: | Cfb - Oceanic Climate |
| Ecoregion: | 2e - Eastern Puget Uplands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 98038 - Maple Valley, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 33 | 34 | 36 | 39 | 44 | 49 | 52 | 52 | 47 | 41 | 36 | 33 | 41 |
| Avg Max Temp (°F) | 44 | 49 | 53 | 59 | 65 | 70 | 76 | 76 | 70 | 60 | 49 | 44 | 59 |
| Avg Precip (In.) | 6.52 | 5.28 | 4.86 | 3.98 | 3.11 | 2.67 | 1.45 | 1.41 | 2.36 | 4.13 | 7.44 | 6.9 | 50.12 |