| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 4a - Western Cascades Lowlands and Valleys |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 98610 - Carson, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 32 | 33 | 36 | 39 | 45 | 50 | 54 | 55 | 49 | 42 | 37 | 32 | 42 |
| Avg Max Temp (°F) | 42 | 46 | 53 | 58 | 65 | 71 | 78 | 80 | 74 | 62 | 49 | 42 | 60 |
| Avg Precip (In.) | 12.59 | 9.28 | 6.75 | 3.69 | 2.99 | 1.81 | .87 | 1.07 | 2.62 | 6.18 | 10.6 | 14.38 | 72.84 |