Clarks Hill, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.6 °F (low) to 75.1 °F (high). Annual precipitation averages 45.8 Inches. Clarks Hill 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 | 33.9 °F | 56.2 °F | 4.0 in. |
| February | 36.1 °F | 59.6 °F | 3.88 in. |
| March | 42.1 °F | 67.5 °F | 4.52 in. |
| April | 49.9 °F | 75.6 °F | 2.93 in. |
| May | 58.8 °F | 83.0 °F | 3.26 in. |
| June | 66.8 °F | 89.3 °F | 4.55 in. |
| July | 69.8 °F | 92.2 °F | 4.31 in. |
| August | 68.9 °F | 90.9 °F | 4.4 in. |
| September | 63.3 °F | 85.9 °F | 3.7 in. |
| October | 52.1 °F | 76.7 °F | 2.84 in. |
| November | 41.0 °F | 66.4 °F | 3.2 in. |
| December | 36.3 °F | 58.3 °F | 4.16 in. |
| Annual | 51.6 °F | 75.1 °F | 45.75 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 |