| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Sep.11 - Sep. 20 |
| Average Last Frost Date: | Jun. 1 - Jun. 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 15r - Okanogan-Colville Xeric Valleys and Foothills |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 99150 - Malo, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 20 | 25 | 31 | 39 | 45 | 48 | 47 | 40 | 31 | 25 | 17 | 32 |
| Avg Max Temp (°F) | 30 | 38 | 47 | 58 | 66 | 73 | 80 | 81 | 71 | 56 | 38 | 30 | 56 |
| Avg Precip (In.) | 1.22 | 1.11 | 1.12 | 1.07 | 1.75 | 1.8 | 1.12 | .95 | .79 | .81 | 1.49 | 1.51 | 14.75 |