Ewen, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.5 °C (low) to 10.8 °C (high). Annual precipitation averages 860.1 Millimeters. Ewen 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 | -15.1 °C | -5.4 °C | 48.01 mm |
| February | -15.6 °C | -3.2 °C | 37.85 mm |
| March | -10.8 °C | 3.1 °C | 45.47 mm |
| April | -3.4 °C | 9.7 °C | 70.87 mm |
| May | 3.6 °C | 18 °C | 82.8 mm |
| June | 9.1 °C | 23.2 °C | 91.95 mm |
| July | 11.8 °C | 25.6 °C | 97.28 mm |
| August | 10.7 °C | 24.6 °C | 83.57 mm |
| September | 7 °C | 20.1 °C | 89.41 mm |
| October | 0.9 °C | 12.1 °C | 94.49 mm |
| November | -4.7 °C | 3.8 °C | 61.47 mm |
| December | -11.2 °C | -2.6 °C | 56.9 mm |
| Annual | -1.5 °C | 10.8 °C | 860.07 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |