Baker, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -0.3 °C (low) to 13.5 °C (high). Annual precipitation averages 381.5 Millimeters. 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 | -13.7 °C | -1.9 °C | 10.16 mm |
| February | -11.9 °C | 0 °C | 9.65 mm |
| March | -6.7 °C | 6.1 °C | 14.22 mm |
| April | -1.1 °C | 12.8 °C | 33.78 mm |
| May | 4.9 °C | 18.5 °C | 65.79 mm |
| June | 10.3 °C | 24.3 °C | 71.37 mm |
| July | 13.8 °C | 29.7 °C | 51.05 mm |
| August | 12.5 °C | 29.4 °C | 36.58 mm |
| September | 7.1 °C | 23.2 °C | 35.81 mm |
| October | 0.1 °C | 14.1 °C | 31.24 mm |
| November | -6.7 °C | 5.9 °C | 12.19 mm |
| December | -11.8 °C | 0 °C | 9.65 mm |
| Annual | -0.3 °C | 13.5 °C | 381.49 mm |
| 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 : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |