| 2023 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 | |
| 2012 Hardiness Zone: | 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: | October 1 - 10 | |
| Average Last Frost Date: | May 1 - 10 | |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate | |
| Ecoregion: | 4a - Western Cascades Lowlands and Valleys | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 98356 - Morton, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 32 | 34 | 37 | 42 | 46 | 50 | 50 | 45 | 39 | 35 | 31 | 39 |
| Avg Max Temp (°F) | 44 | 48 | 52 | 58 | 65 | 70 | 76 | 77 | 72 | 61 | 49 | 44 | 60 |
| Avg Precip (In.) | 11.59 | 9.44 | 7.75 | 6.09 | 4.03 | 3.01 | 1.49 | 1.64 | 3.4 | 6 | 11.92 | 12.48 | 78.84 |