| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°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 4b: -25F to -20F | |
| Average First Frost Date: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 21 - May 31 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 15l - Salish Mountains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 59922 - Lakeside, MT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 20 | 25 | 32 | 39 | 45 | 49 | 49 | 40 | 32 | 24 | 18 | 32 |
| Avg Max Temp (°F) | 31 | 37 | 45 | 56 | 66 | 73 | 81 | 81 | 70 | 56 | 40 | 31 | 55 |
| Avg Precip (In.) | 1.63 | 1.27 | 1.36 | 1.52 | 2.38 | 2.45 | 1.62 | 1.26 | 1.64 | 1.22 | 1.7 | 1.74 | 19.8 |