Radersburg, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -0.6 °C (low) to 14 °C (high). Annual precipitation averages 313.2 Millimeters. 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 | -10.1 °C | 1.3 °C | 9.91 mm |
| February | -8.8 °C | 3.3 °C | 8.64 mm |
| March | -5.2 °C | 8.4 °C | 15.49 mm |
| April | -1.4 °C | 13.2 °C | 29.97 mm |
| May | 3.2 °C | 18.2 °C | 50.8 mm |
| June | 7.1 °C | 22.8 °C | 65.28 mm |
| July | 10.1 °C | 28.6 °C | 32.26 mm |
| August | 8.8 °C | 28.1 °C | 27.43 mm |
| September | 4.8 °C | 22.4 °C | 25.65 mm |
| October | -0.6 °C | 14.4 °C | 21.84 mm |
| November | -5.7 °C | 6.3 °C | 14.48 mm |
| December | -9.9 °C | 1.2 °C | 11.43 mm |
| Annual | -0.6 °C | 14 °C | 313.18 mm |
| 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 : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |