Green Sea, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.1 °C (low) to 23.3 °C (high). Annual precipitation averages 1354.6 Millimeters. Green Sea 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.1 °C | 13.3 °C | 95.5 mm |
| February | 2.2 °C | 15.1 °C | 86.61 mm |
| March | 5.4 °C | 19.1 °C | 95.25 mm |
| April | 10.1 °C | 23.7 °C | 86.36 mm |
| May | 15 °C | 27.4 °C | 101.09 mm |
| June | 19.7 °C | 30.7 °C | 141.48 mm |
| July | 21.7 °C | 32.1 °C | 146.56 mm |
| August | 20.9 °C | 31.4 °C | 161.8 mm |
| September | 17.8 °C | 28.4 °C | 170.18 mm |
| October | 11.4 °C | 24.2 °C | 94.49 mm |
| November | 5.6 °C | 18.9 °C | 84.58 mm |
| December | 2.6 °C | 14.8 °C | 90.68 mm |
| Annual | 11.1 °C | 23.3 °C | 1354.58 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |