Greenville, Indiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45 °F (low) to 65.8 °F (high). Annual precipitation averages 49.2 Inches. Greenville is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.6 °F | 41.0 °F | 3.69 in. |
| February | 26.2 °F | 45.9 °F | 3.42 in. |
| March | 33.9 °F | 55.8 °F | 4.49 in. |
| April | 43.9 °F | 67.1 °F | 5.07 in. |
| May | 54.1 °F | 75.6 °F | 5.3 in. |
| June | 62.4 °F | 83.2 °F | 4.72 in. |
| July | 66.0 °F | 86.3 °F | 4.06 in. |
| August | 64.6 °F | 85.7 °F | 3.3 in. |
| September | 57.1 °F | 80.0 °F | 3.69 in. |
| October | 45.2 °F | 68.7 °F | 3.59 in. |
| November | 35.0 °F | 55.8 °F | 3.7 in. |
| December | 27.9 °F | 44.9 °F | 4.19 in. |
| Annual | 45 °F | 65.8 °F | 49.22 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |