Martinsdale, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -1.4 °C (low) to 13.5 °C (high). Annual precipitation averages 367.5 Millimeters. Martinsdale 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.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.7 °C | 2 °C | 12.45 mm |
| February | -9.6 °C | 3 °C | 10.41 mm |
| March | -6.2 °C | 7.3 °C | 17.27 mm |
| April | -2.7 °C | 12.1 °C | 38.35 mm |
| May | 1.8 °C | 17.1 °C | 66.04 mm |
| June | 6 °C | 21.8 °C | 67.82 mm |
| July | 8.7 °C | 27.5 °C | 39.88 mm |
| August | 7.7 °C | 27.4 °C | 32.51 mm |
| September | 3.7 °C | 21.8 °C | 27.94 mm |
| October | -1.1 °C | 14 °C | 22.86 mm |
| November | -5.9 °C | 6.2 °C | 18.29 mm |
| December | -9.4 °C | 1.5 °C | 13.72 mm |
| Annual | -1.4 °C | 13.5 °C | 367.54 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 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 | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |