Awendaw, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.3 °C (low) to 23.9 °C (high). Annual precipitation averages 1389.9 Millimeters. Awendaw 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 Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.5 °C | 14.8 °C | 85.6 mm |
| February | 4.6 °C | 16.2 °C | 85.34 mm |
| March | 7.9 °C | 19.7 °C | 97.03 mm |
| April | 12.3 °C | 23.9 °C | 84.07 mm |
| May | 17.2 °C | 27.5 °C | 86.11 mm |
| June | 21.1 °C | 30.6 °C | 155.19 mm |
| July | 23.1 °C | 32.2 °C | 164.08 mm |
| August | 22.6 °C | 31.4 °C | 172.47 mm |
| September | 19.9 °C | 29.2 °C | 167.39 mm |
| October | 14 °C | 24.9 °C | 125.98 mm |
| November | 8.1 °C | 20 °C | 74.68 mm |
| December | 5.1 °C | 16.3 °C | 91.95 mm |
| Annual | 13.3 °C | 23.9 °C | 1389.89 mm |
| 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 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |