| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F | |
| Average First Frost Date: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | Jun. 1 - Jun. 10 | |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer | |
| Ecoregion: | 15u - Inland Maritime Foothills and Valleys | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 83811 - Clark Fork, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 22 | 27 | 32 | 39 | 44 | 49 | 49 | 42 | 34 | 27 | 21 | 34 |
| Avg Max Temp (°F) | 32 | 37 | 45 | 53 | 61 | 68 | 76 | 76 | 68 | 53 | 38 | 32 | 53 |
| Avg Precip (In.) | 3.61 | 2.87 | 2.56 | 2.03 | 2.43 | 2.37 | 1.34 | 1.32 | 1.51 | 2.17 | 3.98 | 4.25 | 30.44 |