McClellanville, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.9 °F (low) to 74.9 °F (high). Annual precipitation averages 55.1 Inches. McClellanville is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.5 °F | 58.8 °F | 3.31 in. |
| February | 40.5 °F | 61.4 °F | 3.32 in. |
| March | 47.4 °F | 67.5 °F | 3.92 in. |
| April | 54.1 °F | 74.9 °F | 3.3 in. |
| May | 64.3 °F | 81.2 °F | 3.33 in. |
| June | 70.8 °F | 86.6 °F | 6.3 in. |
| July | 73.8 °F | 89.6 °F | 6.46 in. |
| August | 72.8 °F | 88.2 °F | 6.67 in. |
| September | 69.2 °F | 84.4 °F | 6.83 in. |
| October | 59.2 °F | 76.8 °F | 5.17 in. |
| November | 48.6 °F | 68.3 °F | 2.97 in. |
| December | 42.3 °F | 61.3 °F | 3.56 in. |
| Annual | 56.9 °F | 74.9 °F | 55.14 in. |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 10-20 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |