| 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.1 - Sep. 10 |
| Average Last Frost Date: | Jun. 21 - Jun. 30 |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer |
| Ecoregion: | 15r - Okanogan-Colville Xeric Valleys and Foothills |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 99148 - Loon Lake, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 24 | 28 | 33 | 41 | 47 | 52 | 51 | 43 | 34 | 28 | 21 | 35 |
| Avg Max Temp (°F) | 32 | 39 | 47 | 57 | 67 | 74 | 83 | 83 | 73 | 58 | 40 | 32 | 57 |
| Avg Precip (In.) | 2.51 | 2.44 | 2.32 | 1.82 | 2.11 | 1.85 | 1.07 | .8 | 1.04 | 1.48 | 3.34 | 3.2 | 23.97 |