Emigrant, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.4 °F (low) to 57.4 °F (high). Annual precipitation averages 13.3 Inches. Emigrant 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 | 17.0 °F | 35.3 °F | 0.47 in. |
| February | 17.8 °F | 37.7 °F | 0.39 in. |
| March | 24.4 °F | 47.0 °F | 0.66 in. |
| April | 30.5 °F | 55.0 °F | 1.34 in. |
| May | 38.2 °F | 64.1 °F | 1.9 in. |
| June | 45.1 °F | 73.0 °F | 2.23 in. |
| July | 50.8 °F | 83.8 °F | 1.43 in. |
| August | 49.2 °F | 83.2 °F | 1.24 in. |
| September | 42.4 °F | 73.0 °F | 1.2 in. |
| October | 33.0 °F | 58.3 °F | 1.05 in. |
| November | 23.9 °F | 43.7 °F | 0.78 in. |
| December | 16.9 °F | 34.5 °F | 0.63 in. |
| Annual | 32.4 °F | 57.4 °F | 13.32 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |