| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°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 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| 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: | 15c - Flathead Valley | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 59912 - Columbia Falls, MT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 18 | 24 | 31 | 38 | 44 | 48 | 47 | 38 | 30 | 24 | 17 | 31 |
| Avg Max Temp (°F) | 29 | 35 | 44 | 55 | 64 | 72 | 80 | 79 | 68 | 54 | 38 | 30 | 54 |
| Avg Precip (In.) | 1.71 | 1.32 | 1.23 | 1.4 | 2.27 | 2.63 | 1.61 | 1.37 | 1.35 | 1.24 | 1.88 | 1.85 | 19.87 |