Warrenville, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11 °C (low) to 24.5 °C (high). Annual precipitation averages 1223 Millimeters. Warrenville 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.3 °C | 14.2 °C | 109.98 mm |
| February | 2.8 °C | 16.3 °C | 97.03 mm |
| March | 6.1 °C | 20.5 °C | 111.25 mm |
| April | 10.2 °C | 24.9 °C | 82.04 mm |
| May | 15.2 °C | 28.9 °C | 83.31 mm |
| June | 19.5 °C | 32.1 °C | 129.03 mm |
| July | 20.8 °C | 33.8 °C | 118.11 mm |
| August | 20.6 °C | 32.9 °C | 126.24 mm |
| September | 17.3 °C | 30.3 °C | 98.04 mm |
| October | 11.6 °C | 25.1 °C | 78.74 mm |
| November | 4.6 °C | 19.4 °C | 82.8 mm |
| December | 1.7 °C | 15.2 °C | 106.43 mm |
| Annual | 11 °C | 24.5 °C | 1223 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |