Ekalaka, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.2 °C (low) to 13.9 °C (high). Annual precipitation averages 462.5 Millimeters. Ekalaka is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.2 °C | -0.2 °C | 14.99 mm |
| February | -10.8 °C | 1.2 °C | 17.53 mm |
| March | -5.9 °C | 7.1 °C | 24.13 mm |
| April | -0.8 °C | 13.2 °C | 47.24 mm |
| May | 4.6 °C | 18.6 °C | 83.31 mm |
| June | 9.9 °C | 24.2 °C | 74.42 mm |
| July | 13.8 °C | 29.2 °C | 54.86 mm |
| August | 13 °C | 28.9 °C | 34.29 mm |
| September | 7.4 °C | 23.3 °C | 39.88 mm |
| October | 0.5 °C | 14.4 °C | 38.35 mm |
| November | -5.9 °C | 6.3 °C | 20.07 mm |
| December | -10.8 °C | 0.9 °C | 13.46 mm |
| Annual | 0.2 °C | 13.9 °C | 462.53 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |