Glendive, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.5 °C (low) to 14.6 °C (high). Annual precipitation averages 368.6 Millimeters. 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 | -13.9 °C | -1.8 °C | 7.11 mm |
| February | -11.9 °C | 0.8 °C | 8.13 mm |
| March | -6 °C | 7.6 °C | 13.46 mm |
| April | 0.1 °C | 14.6 °C | 34.29 mm |
| May | 6.1 °C | 20.3 °C | 68.07 mm |
| June | 11.5 °C | 25.6 °C | 62.74 mm |
| July | 14.8 °C | 31 °C | 57.66 mm |
| August | 13.4 °C | 30.6 °C | 37.59 mm |
| September | 7.8 °C | 24.7 °C | 32 mm |
| October | 1.3 °C | 15.5 °C | 26.92 mm |
| November | -5.9 °C | 6.7 °C | 10.67 mm |
| December | -11.8 °C | 0.1 °C | 9.91 mm |
| Annual | 0.5 °C | 14.6 °C | 368.55 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 |