Oak Grove, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53 °F (low) to 75.3 °F (high). Annual precipitation averages 49 Inches. Oak Grove 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 | 34.6 °F | 56.6 °F | 4.0 in. |
| February | 37.0 °F | 60.2 °F | 3.77 in. |
| March | 43.5 °F | 67.7 °F | 4.32 in. |
| April | 51.6 °F | 76.3 °F | 3.17 in. |
| May | 60.5 °F | 83.3 °F | 3.37 in. |
| June | 68.4 °F | 89.3 °F | 5.04 in. |
| July | 71.6 °F | 92.4 °F | 4.78 in. |
| August | 70.8 °F | 90.7 °F | 4.94 in. |
| September | 65.1 °F | 85.8 °F | 4.21 in. |
| October | 53.3 °F | 76.4 °F | 3.84 in. |
| November | 42.3 °F | 66.4 °F | 3.53 in. |
| December | 36.9 °F | 58.8 °F | 4.06 in. |
| Annual | 53 °F | 75.3 °F | 49.03 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 |