Plevna, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -0.4 °C (low) to 14 °C (high). Annual precipitation averages 406.2 Millimeters. Plevna is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.2 °C | -1.6 °C | 13.72 mm |
| February | -12 °C | 0.4 °C | 11.94 mm |
| March | -6.7 °C | 6.7 °C | 19.56 mm |
| April | -1 °C | 13.6 °C | 40.13 mm |
| May | 4.8 °C | 19.2 °C | 73.91 mm |
| June | 10.3 °C | 24.7 °C | 69.34 mm |
| July | 13.7 °C | 30.2 °C | 49.53 mm |
| August | 12.3 °C | 29.7 °C | 35.31 mm |
| September | 6.9 °C | 23.9 °C | 36.07 mm |
| October | -0.1 °C | 14.8 °C | 30.48 mm |
| November | -6.9 °C | 6.3 °C | 14.99 mm |
| December | -12.3 °C | 0.2 °C | 11.18 mm |
| Annual | -0.4 °C | 14 °C | 406.16 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |