Georgetown, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.5 °C (low) to 23.8 °C (high). Annual precipitation averages 1431.8 Millimeters. Georgetown is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.6 °C | 14.6 °C | 98.3 mm |
| February | 3.8 °C | 16.1 °C | 86.87 mm |
| March | 6.9 °C | 19.6 °C | 96.01 mm |
| April | 11.6 °C | 23.9 °C | 82.04 mm |
| May | 16.1 °C | 27.8 °C | 96.27 mm |
| June | 20.4 °C | 30.5 °C | 142.24 mm |
| July | 22.4 °C | 32.3 °C | 154.43 mm |
| August | 22 °C | 31.3 °C | 185.93 mm |
| September | 19.3 °C | 28.9 °C | 184.66 mm |
| October | 13.1 °C | 24.8 °C | 133.35 mm |
| November | 7.1 °C | 19.9 °C | 74.93 mm |
| December | 4.2 °C | 16.1 °C | 96.77 mm |
| Annual | 12.5 °C | 23.8 °C | 1431.8 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°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 |