Shepherd, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 33.3 °F (low) to 61.2 °F (high). Annual precipitation averages 14.6 Inches. Shepherd 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 | 13.3 °F | 37.0 °F | 0.46 in. |
| February | 15.6 °F | 40.6 °F | 0.51 in. |
| March | 23.4 °F | 51.0 °F | 0.84 in. |
| April | 32.1 °F | 59.3 °F | 1.74 in. |
| May | 41.5 °F | 68.7 °F | 2.51 in. |
| June | 50.0 °F | 78.3 °F | 2.3 in. |
| July | 55.7 °F | 88.3 °F | 1.45 in. |
| August | 53.5 °F | 87.3 °F | 0.92 in. |
| September | 44.2 °F | 76.4 °F | 1.38 in. |
| October | 32.8 °F | 61.5 °F | 1.42 in. |
| November | 22.6 °F | 47.9 °F | 0.56 in. |
| December | 14.5 °F | 37.8 °F | 0.51 in. |
| Annual | 33.3 °F | 61.2 °F | 14.6 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |