West Glendive, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.2 °C (low) to 14.3 °C (high). Annual precipitation averages 368.8 Millimeters. West Glendive is located in USDA Plant Hardiness Zone 4a. 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 | -14.2 °C | -2.1 °C | 6.86 mm |
| February | -12.3 °C | 0.4 °C | 8.13 mm |
| March | -6.3 °C | 7.3 °C | 13.21 mm |
| April | -0.1 °C | 14.3 °C | 34.04 mm |
| May | 5.8 °C | 19.9 °C | 67.82 mm |
| June | 11.3 °C | 25.3 °C | 61.98 mm |
| July | 14.6 °C | 30.7 °C | 58.42 mm |
| August | 13.2 °C | 30.4 °C | 37.34 mm |
| September | 7.5 °C | 24.4 °C | 34.04 mm |
| October | 0.9 °C | 15.3 °C | 26.67 mm |
| November | -6.2 °C | 6.4 °C | 10.41 mm |
| December | -11.9 °C | -0.2 °C | 9.91 mm |
| Annual | 0.2 °C | 14.3 °C | 368.83 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 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |