Greenville, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.2 °C (low) to 24.3 °C (high). Annual precipitation averages 1117.1 Millimeters. Greenville is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.2 °C | 12.9 °C | 73.15 mm |
| February | 3.2 °C | 15.3 °C | 83.31 mm |
| March | 7.2 °C | 19.6 °C | 101.85 mm |
| April | 11.3 °C | 23.7 °C | 99.57 mm |
| May | 16.8 °C | 27.8 °C | 127.25 mm |
| June | 21.3 °C | 32.2 °C | 96.52 mm |
| July | 23.1 °C | 34.7 °C | 65.53 mm |
| August | 22.6 °C | 35.1 °C | 66.04 mm |
| September | 18.6 °C | 31.4 °C | 81.79 mm |
| October | 12.4 °C | 25.6 °C | 127.76 mm |
| November | 6.7 °C | 19 °C | 95.25 mm |
| December | 2.3 °C | 14.1 °C | 99.06 mm |
| Annual | 12.2 °C | 24.3 °C | 1117.08 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 50-75 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 |