| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F | |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4b: -25°F to -20°F Zone 5a: -20°F to -15°F Zone 4a: -30°F to -25°F | |
| 1990 Hardiness Zone: | Zone 3b: -35F to -30F | |
| Average First Frost Date: | Aug. 11 - Aug. 20 | |
| Average Last Frost Date: | Jul. 21 - Jul. 31 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 41c - Western Canadian Rockies | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 59928 - Polebridge, MT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 11 | 18 | 25 | 33 | 39 | 42 | 40 | 33 | 25 | 18 | 10 | 25 |
| Avg Max Temp (°F) | 28 | 35 | 43 | 53 | 62 | 70 | 77 | 78 | 67 | 54 | 37 | 29 | 53 |
| Avg Precip (In.) | 2.22 | 1.77 | 1.43 | 1.19 | 1.69 | 2.28 | 1.59 | 1.33 | 1.19 | 1.37 | 2.36 | 2.4 | 20.81 |