Seabrook, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56 °F (low) to 76.7 °F (high). Annual precipitation averages 52.1 Inches. Seabrook is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.2 °F | 60.2 °F | 3.79 in. |
| February | 40.9 °F | 63.4 °F | 3.54 in. |
| March | 47.0 °F | 69.8 °F | 3.41 in. |
| April | 54.3 °F | 76.9 °F | 3.42 in. |
| May | 62.6 °F | 83.8 °F | 3.18 in. |
| June | 69.7 °F | 88.8 °F | 5.77 in. |
| July | 73.1 °F | 91.5 °F | 6.2 in. |
| August | 72.4 °F | 90.0 °F | 6.84 in. |
| September | 67.9 °F | 85.7 °F | 5.4 in. |
| October | 57.4 °F | 78.2 °F | 3.86 in. |
| November | 46.8 °F | 69.2 °F | 2.95 in. |
| December | 41.3 °F | 62.8 °F | 3.77 in. |
| Annual | 56 °F | 76.7 °F | 52.13 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |