Free Soil, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.6 °C (low) to 12.9 °C (high). Annual precipitation averages 905.5 Millimeters. Free Soil is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.8 °C | -1.6 °C | 60.2 mm |
| February | -8.7 °C | -0.2 °C | 44.45 mm |
| March | -5.4 °C | 4.8 °C | 55.12 mm |
| April | 0.5 °C | 12.2 °C | 86.11 mm |
| May | 6.6 °C | 19.2 °C | 87.88 mm |
| June | 11.9 °C | 24.3 °C | 87.88 mm |
| July | 14.4 °C | 26.2 °C | 76.96 mm |
| August | 13.6 °C | 25.6 °C | 81.53 mm |
| September | 9.6 °C | 21.8 °C | 80.01 mm |
| October | 3.9 °C | 14.7 °C | 100.33 mm |
| November | -0.9 °C | 7.1 °C | 79.5 mm |
| December | -5.3 °C | 1.2 °C | 65.53 mm |
| Annual | 2.6 °C | 12.9 °C | 905.5 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |