Blackville, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.7 °F (low) to 75.9 °F (high). Annual precipitation averages 48.7 Inches. Blackville 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 | 35.0 °F | 58.0 °F | 3.95 in. |
| February | 37.5 °F | 61.8 °F | 3.74 in. |
| March | 43.4 °F | 69.0 °F | 3.97 in. |
| April | 51.1 °F | 76.6 °F | 3.2 in. |
| May | 60.0 °F | 83.8 °F | 3.4 in. |
| June | 67.4 °F | 89.3 °F | 5.82 in. |
| July | 70.8 °F | 92.3 °F | 5.1 in. |
| August | 69.9 °F | 89.8 °F | 5.44 in. |
| September | 64.5 °F | 85.6 °F | 4.18 in. |
| October | 53.0 °F | 77.2 °F | 3.29 in. |
| November | 42.5 °F | 67.5 °F | 2.8 in. |
| December | 37.1 °F | 60.0 °F | 3.81 in. |
| Annual | 52.7 °F | 75.9 °F | 48.7 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 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 |