Redstone, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 27.5 °F (low) to 53.6 °F (high). Annual precipitation averages 14.2 Inches. Redstone is located in USDA Plant Hardiness Zone 3a. 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 | -0.2 °F | 21.9 °F | 0.37 in. |
| February | 4.6 °F | 26.7 °F | 0.24 in. |
| March | 15.9 °F | 38.7 °F | 0.59 in. |
| April | 27.3 °F | 55.5 °F | 0.98 in. |
| May | 38.4 °F | 67.0 °F | 2.1 in. |
| June | 48.7 °F | 75.2 °F | 3.15 in. |
| July | 53.3 °F | 82.6 °F | 2.47 in. |
| August | 51.0 °F | 83.1 °F | 1.47 in. |
| September | 40.9 °F | 72.2 °F | 1.12 in. |
| October | 28.7 °F | 55.8 °F | 0.87 in. |
| November | 16.1 °F | 38.2 °F | 0.47 in. |
| December | 5.0 °F | 26.2 °F | 0.36 in. |
| Annual | 27.5 °F | 53.6 °F | 14.19 in. |
| 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 3a : -40°F to -35°F |
| Plant Hardiness Zone - 2012 | Zone 3a : -40°F to -35°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |