| 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 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 | |
| 1990 Hardiness Zone: | Zone 3b: -35F to -30F | |
| Average First Frost Date: | Aug. 11 - Aug. 20 | |
| Average Last Frost Date: | Jun. 21 - Jun. 30 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 17x - Rattlesnake-Blackfoot-South Swan-Northern Garnet-Sapphire Mountains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 59868 - Seeley Lake, MT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 14 | 21 | 28 | 35 | 42 | 45 | 44 | 36 | 29 | 21 | 12 | 28 |
| Avg Max Temp (°F) | 30 | 36 | 44 | 54 | 63 | 71 | 80 | 81 | 70 | 56 | 38 | 29 | 54 |
| Avg Precip (In.) | 2.41 | 1.69 | 1.38 | 1.02 | 1.78 | 2.07 | 1.17 | 1.32 | 1.25 | 1.36 | 2.22 | 2.33 | 19.99 |