Greenville, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.1 °F (low) to 60.7 °F (high). Annual precipitation averages 40.5 Inches. Greenville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.2 °F | 33.8 °F | 2.83 in. |
| February | 20.7 °F | 37.8 °F | 2.24 in. |
| March | 29.2 °F | 48.2 °F | 3.2 in. |
| April | 39.5 °F | 61.4 °F | 4.15 in. |
| May | 50.8 °F | 71.8 °F | 4.37 in. |
| June | 60.2 °F | 80.3 °F | 4.45 in. |
| July | 62.6 °F | 83.0 °F | 4.06 in. |
| August | 60.5 °F | 82.1 °F | 3.39 in. |
| September | 53.0 °F | 76.9 °F | 2.86 in. |
| October | 42.1 °F | 64.5 °F | 2.89 in. |
| November | 32.1 °F | 50.4 °F | 3.11 in. |
| December | 24.1 °F | 38.7 °F | 2.93 in. |
| Annual | 41.1 °F | 60.7 °F | 40.48 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 |