Plevna, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 31.2 °F (low) to 57.2 °F (high). Annual precipitation averages 16 Inches. 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 | 6.5 °F | 29.1 °F | 0.54 in. |
| February | 10.4 °F | 32.7 °F | 0.47 in. |
| March | 19.9 °F | 44.1 °F | 0.77 in. |
| April | 30.2 °F | 56.4 °F | 1.58 in. |
| May | 40.7 °F | 66.5 °F | 2.91 in. |
| June | 50.6 °F | 76.5 °F | 2.73 in. |
| July | 56.6 °F | 86.3 °F | 1.95 in. |
| August | 54.2 °F | 85.5 °F | 1.39 in. |
| September | 44.4 °F | 75.1 °F | 1.42 in. |
| October | 31.9 °F | 58.6 °F | 1.2 in. |
| November | 19.5 °F | 43.4 °F | 0.59 in. |
| December | 9.9 °F | 32.4 °F | 0.44 in. |
| Annual | 31.2 °F | 57.2 °F | 15.99 in. |
| 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 : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |