Jamestown, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.8 °C (low) to 24.5 °C (high). Annual precipitation averages 1325.6 Millimeters. Jamestown 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 | 1.8 °C | 14.8 °C | 91.69 mm |
| February | 3.1 °C | 16.6 °C | 89.41 mm |
| March | 6.3 °C | 20.5 °C | 91.95 mm |
| April | 10.6 °C | 25.1 °C | 86.11 mm |
| May | 15.7 °C | 28.7 °C | 91.95 mm |
| June | 20 °C | 31.5 °C | 137.92 mm |
| July | 22 °C | 33.2 °C | 152.91 mm |
| August | 21.4 °C | 32.3 °C | 158.5 mm |
| September | 18.6 °C | 29.8 °C | 147.57 mm |
| October | 12.3 °C | 25.3 °C | 107.44 mm |
| November | 6.3 °C | 20.2 °C | 73.91 mm |
| December | 3.4 °C | 16.3 °C | 96.27 mm |
| Annual | 11.8 °C | 24.5 °C | 1325.63 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 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 |