Silver Star, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30.2 °F (low) to 58.5 °F (high). Annual precipitation averages 10.5 Inches. Silver Star is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.8 °F | 36.1 °F | 0.31 in. |
| February | 16.3 °F | 39.4 °F | 0.29 in. |
| March | 22.7 °F | 47.9 °F | 0.48 in. |
| April | 29.0 °F | 56.4 °F | 0.97 in. |
| May | 37.0 °F | 65.5 °F | 1.84 in. |
| June | 43.7 °F | 74.0 °F | 2.18 in. |
| July | 48.6 °F | 85.3 °F | 1.04 in. |
| August | 46.5 °F | 84.1 °F | 0.85 in. |
| September | 39.2 °F | 73.9 °F | 0.9 in. |
| October | 30.0 °F | 59.7 °F | 0.79 in. |
| November | 21.1 °F | 44.6 °F | 0.47 in. |
| December | 14.0 °F | 35.1 °F | 0.37 in. |
| Annual | 30.2 °F | 58.5 °F | 10.49 in. |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |