Grover, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.1 °F (low) to 76.1 °F (high). Annual precipitation averages 50.7 Inches. Grover is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 36.4 °F | 59.1 °F | 3.48 in. |
| February | 38.8 °F | 62.5 °F | 3.83 in. |
| March | 44.9 °F | 69.2 °F | 3.74 in. |
| April | 52.4 °F | 76.6 °F | 3.54 in. |
| May | 60.9 °F | 83.2 °F | 3.58 in. |
| June | 68.6 °F | 88.6 °F | 5.57 in. |
| July | 71.7 °F | 91.5 °F | 5.81 in. |
| August | 71.1 °F | 89.8 °F | 5.9 in. |
| September | 66.3 °F | 85.2 °F | 5.05 in. |
| October | 55.1 °F | 77.2 °F | 3.73 in. |
| November | 44.2 °F | 68.4 °F | 2.74 in. |
| December | 38.8 °F | 61.5 °F | 3.74 in. |
| Annual | 54.1 °F | 76.1 °F | 50.71 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |