Greenville, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.1 °C (low) to 13.7 °C (high). Annual precipitation averages 935.7 Millimeters. Greenville 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.2 °C | -1.5 °C | 59.44 mm |
| February | -8.9 °C | 0.1 °C | 49.78 mm |
| March | -4.6 °C | 5.8 °C | 59.18 mm |
| April | 1.5 °C | 13.4 °C | 97.54 mm |
| May | 7.9 °C | 19.9 °C | 103.38 mm |
| June | 13.1 °C | 25.3 °C | 92.46 mm |
| July | 15.2 °C | 27.5 °C | 83.31 mm |
| August | 14.4 °C | 26.6 °C | 89.66 mm |
| September | 10 °C | 22.7 °C | 76.96 mm |
| October | 4 °C | 15.5 °C | 90.17 mm |
| November | -1.1 °C | 7.7 °C | 74.68 mm |
| December | -5.7 °C | 1.4 °C | 59.18 mm |
| Annual | 3.1 °C | 13.7 °C | 935.74 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |