Landusky, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -0.1 °C (low) to 12.2 °C (high). Annual precipitation averages 522.2 Millimeters. Landusky is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.1 °C | 0.8 °C | 18.29 mm |
| February | -10 °C | 1.3 °C | 17.27 mm |
| March | -6.1 °C | 5.4 °C | 22.86 mm |
| April | -1.6 °C | 10.5 °C | 47.5 mm |
| May | 3.5 °C | 15.7 °C | 86.11 mm |
| June | 8.2 °C | 20.7 °C | 114.05 mm |
| July | 11.8 °C | 26.6 °C | 48.01 mm |
| August | 11.3 °C | 26.3 °C | 46.23 mm |
| September | 6.3 °C | 19.9 °C | 46.23 mm |
| October | 0.1 °C | 12.1 °C | 36.32 mm |
| November | -4.9 °C | 5.6 °C | 21.59 mm |
| December | -9.2 °C | 1.3 °C | 17.78 mm |
| Annual | -0.1 °C | 12.2 °C | 522.24 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |