Greenville, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.5 °F (low) to 56.7 °F (high). Annual precipitation averages 36.8 Inches. 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 | 15.5 °F | 29.3 °F | 2.34 in. |
| February | 16.0 °F | 32.1 °F | 1.96 in. |
| March | 23.7 °F | 42.5 °F | 2.33 in. |
| April | 34.7 °F | 56.1 °F | 3.84 in. |
| May | 46.3 °F | 67.9 °F | 4.07 in. |
| June | 55.5 °F | 77.6 °F | 3.64 in. |
| July | 59.3 °F | 81.5 °F | 3.28 in. |
| August | 57.9 °F | 79.8 °F | 3.53 in. |
| September | 50.0 °F | 72.9 °F | 3.03 in. |
| October | 39.2 °F | 59.9 °F | 3.55 in. |
| November | 30.0 °F | 45.9 °F | 2.94 in. |
| December | 21.8 °F | 34.5 °F | 2.33 in. |
| Annual | 37.5 °F | 56.7 °F | 36.84 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |