| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| Average First Frost Date: | Sep.1 - Sep. 10 | |
| Average Last Frost Date: | Jun. 11 - Jun. 20 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 15y - Granitic Selkirk Mountains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 99153 - Metaline Falls, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 21 | 26 | 32 | 39 | 46 | 50 | 49 | 42 | 34 | 26 | 19 | 33 |
| Avg Max Temp (°F) | 30 | 36 | 45 | 56 | 63 | 70 | 79 | 80 | 70 | 54 | 38 | 30 | 54 |
| Avg Precip (In.) | 3 | 2.25 | 2.07 | 1.8 | 2.49 | 2.84 | 1.46 | 1.13 | 1.58 | 2.88 | 3.03 | 3.65 | 28.19 |