Fairgrove, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.1 °C (low) to 13.7 °C (high). Annual precipitation averages 836.9 Millimeters. Fairgrove is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.4 °C | -1.5 °C | 50.8 mm |
| February | -9.4 °C | -0.1 °C | 41.91 mm |
| March | -4.7 °C | 5.6 °C | 48.77 mm |
| April | 1.3 °C | 12.9 °C | 86.61 mm |
| May | 7.7 °C | 19.9 °C | 88.9 mm |
| June | 13.2 °C | 25.4 °C | 87.88 mm |
| July | 15.2 °C | 27.6 °C | 83.06 mm |
| August | 14.2 °C | 26.3 °C | 81.79 mm |
| September | 10.2 °C | 22.9 °C | 74.68 mm |
| October | 4.4 °C | 15.6 °C | 79.25 mm |
| November | -0.7 °C | 7.8 °C | 63.25 mm |
| December | -5.4 °C | 1.5 °C | 50.04 mm |
| Annual | 3.1 °C | 13.7 °C | 836.94 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 |