Greenville, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.8 °C (low) to 24.7 °C (high). Annual precipitation averages 1463.3 Millimeters. Greenville is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.9 °C | 14.7 °C | 139.45 mm |
| February | 3.8 °C | 17.1 °C | 118.36 mm |
| March | 7.2 °C | 21.2 °C | 144.02 mm |
| April | 10.8 °C | 24.8 °C | 111.76 mm |
| May | 15.7 °C | 28.8 °C | 100.58 mm |
| June | 19.7 °C | 31.7 °C | 127 mm |
| July | 21.3 °C | 32.9 °C | 138.43 mm |
| August | 21.1 °C | 32.6 °C | 122.43 mm |
| September | 18.3 °C | 30.4 °C | 113.03 mm |
| October | 12.1 °C | 25.7 °C | 93.22 mm |
| November | 6.1 °C | 20.1 °C | 118.11 mm |
| December | 3.3 °C | 16 °C | 136.91 mm |
| Annual | 11.8 °C | 24.7 °C | 1463.3 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |