Dodson, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -1.3 °C (low) to 13.6 °C (high). Annual precipitation averages 314.5 Millimeters. Dodson is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15.6 °C | -2.9 °C | 14.22 mm |
| February | -13.6 °C | -0.4 °C | 10.67 mm |
| March | -7.4 °C | 6.6 °C | 13.46 mm |
| April | -0.9 °C | 14.2 °C | 23.88 mm |
| May | 4.4 °C | 19.7 °C | 48.26 mm |
| June | 9.6 °C | 24.3 °C | 75.95 mm |
| July | 12.7 °C | 29.8 °C | 34.54 mm |
| August | 11.5 °C | 29.6 °C | 24.13 mm |
| September | 5.8 °C | 23 °C | 26.92 mm |
| October | -0.8 °C | 14.5 °C | 17.53 mm |
| November | -7.7 °C | 5.9 °C | 12.19 mm |
| December | -13.6 °C | -0.9 °C | 12.7 mm |
| Annual | -1.3 °C | 13.6 °C | 314.45 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 3b : -37.2°C to -34.4°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |