Ashland, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.3 °C (low) to 16 °C (high). Annual precipitation averages 400.8 Millimeters. Ashland is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12 °C | 1.5 °C | 14.22 mm |
| February | -10.2 °C | 3.5 °C | 16.51 mm |
| March | -5.2 °C | 9.6 °C | 23.88 mm |
| April | -0.2 °C | 15.2 °C | 42.42 mm |
| May | 5.1 °C | 20.3 °C | 75.69 mm |
| June | 10.2 °C | 26.2 °C | 67.82 mm |
| July | 13.7 °C | 31.8 °C | 39.88 mm |
| August | 12.3 °C | 31.3 °C | 24.89 mm |
| September | 6.8 °C | 25.3 °C | 32.51 mm |
| October | 0.3 °C | 16.3 °C | 34.54 mm |
| November | -5.8 °C | 8.2 °C | 15.49 mm |
| December | -11 °C | 2.2 °C | 12.95 mm |
| Annual | 0.3 °C | 16 °C | 400.8 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°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 |