Lavina, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.1 °C (low) to 15.8 °C (high). Annual precipitation averages 366.3 Millimeters. Lavina is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.2 °C | 3.3 °C | 10.67 mm |
| February | -9.2 °C | 4.8 °C | 10.92 mm |
| March | -5.2 °C | 10.1 °C | 19.56 mm |
| April | -0.8 °C | 14.5 °C | 41.66 mm |
| May | 4.3 °C | 19.7 °C | 67.31 mm |
| June | 9 °C | 24.8 °C | 69.6 mm |
| July | 12.2 °C | 30.7 °C | 37.85 mm |
| August | 10.9 °C | 30.2 °C | 25.65 mm |
| September | 5.9 °C | 24.1 °C | 28.45 mm |
| October | 0.1 °C | 16.1 °C | 30.23 mm |
| November | -5.6 °C | 8.5 °C | 12.95 mm |
| December | -9.8 °C | 3.3 °C | 11.43 mm |
| Annual | 0.1 °C | 15.8 °C | 366.28 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |