Warrenville, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.7 °F (low) to 76 °F (high). Annual precipitation averages 48.2 Inches. 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 | 34.4 °F | 57.5 °F | 4.33 in. |
| February | 37.0 °F | 61.3 °F | 3.82 in. |
| March | 43.0 °F | 68.9 °F | 4.38 in. |
| April | 50.4 °F | 76.9 °F | 3.23 in. |
| May | 59.3 °F | 84.1 °F | 3.28 in. |
| June | 67.1 °F | 89.8 °F | 5.08 in. |
| July | 69.5 °F | 92.8 °F | 4.65 in. |
| August | 69.0 °F | 91.2 °F | 4.97 in. |
| September | 63.2 °F | 86.5 °F | 3.86 in. |
| October | 52.8 °F | 77.1 °F | 3.1 in. |
| November | 40.2 °F | 67.0 °F | 3.26 in. |
| December | 35.0 °F | 59.3 °F | 4.19 in. |
| Annual | 51.7 °F | 76 °F | 48.15 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |