Medicine Lake, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 28.7 °F (low) to 54.2 °F (high). Annual precipitation averages 13.6 Inches. Medicine Lake 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.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.5 °F | 22.2 °F | 0.3 in. |
| February | 5.2 °F | 27.5 °F | 0.21 in. |
| March | 16.6 °F | 39.6 °F | 0.42 in. |
| April | 29.0 °F | 55.8 °F | 0.87 in. |
| May | 40.0 °F | 67.7 °F | 2.02 in. |
| June | 50.2 °F | 75.7 °F | 3.03 in. |
| July | 55.0 °F | 83.5 °F | 2.46 in. |
| August | 52.8 °F | 83.8 °F | 1.38 in. |
| September | 42.4 °F | 73.1 °F | 1.13 in. |
| October | 29.9 °F | 56.0 °F | 0.84 in. |
| November | 16.6 °F | 38.8 °F | 0.5 in. |
| December | 5.8 °F | 26.6 °F | 0.39 in. |
| Annual | 28.7 °F | 54.2 °F | 13.55 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 3b : -35°F to -30°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |