Baker, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 31.5 °F (low) to 56.3 °F (high). Annual precipitation averages 15 Inches. Baker is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.3 °F | 28.5 °F | 0.4 in. |
| February | 10.6 °F | 32.0 °F | 0.38 in. |
| March | 20.0 °F | 43.0 °F | 0.56 in. |
| April | 30.1 °F | 55.1 °F | 1.33 in. |
| May | 40.8 °F | 65.3 °F | 2.59 in. |
| June | 50.6 °F | 75.8 °F | 2.81 in. |
| July | 56.9 °F | 85.5 °F | 2.01 in. |
| August | 54.5 °F | 85.0 °F | 1.44 in. |
| September | 44.7 °F | 73.8 °F | 1.41 in. |
| October | 32.1 °F | 57.4 °F | 1.23 in. |
| November | 19.9 °F | 42.7 °F | 0.48 in. |
| December | 10.7 °F | 32.0 °F | 0.38 in. |
| Annual | 31.5 °F | 56.3 °F | 15.02 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |