Radersburg, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 30.8 °F (low) to 57.2 °F (high). Annual precipitation averages 12.3 Inches. Radersburg is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.9 °F | 34.4 °F | 0.39 in. |
| February | 16.2 °F | 38.0 °F | 0.34 in. |
| March | 22.6 °F | 47.1 °F | 0.61 in. |
| April | 29.5 °F | 55.8 °F | 1.18 in. |
| May | 37.7 °F | 64.7 °F | 2.0 in. |
| June | 44.7 °F | 73.0 °F | 2.57 in. |
| July | 50.1 °F | 83.5 °F | 1.27 in. |
| August | 47.9 °F | 82.5 °F | 1.08 in. |
| September | 40.6 °F | 72.3 °F | 1.01 in. |
| October | 31.0 °F | 58.0 °F | 0.86 in. |
| November | 21.7 °F | 43.4 °F | 0.57 in. |
| December | 14.1 °F | 34.1 °F | 0.45 in. |
| Annual | 30.8 °F | 57.2 °F | 12.33 in. |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |