Yemassee, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.1 °F (low) to 77.3 °F (high). Annual precipitation averages 52.4 Inches. Yemassee is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 36.4 °F | 60.5 °F | 3.83 in. |
| February | 39.2 °F | 63.9 °F | 3.76 in. |
| March | 45.2 °F | 70.6 °F | 3.58 in. |
| April | 52.2 °F | 77.9 °F | 3.2 in. |
| May | 60.7 °F | 84.7 °F | 3.4 in. |
| June | 68.0 °F | 89.8 °F | 5.88 in. |
| July | 71.2 °F | 92.2 °F | 6.28 in. |
| August | 70.9 °F | 90.6 °F | 6.17 in. |
| September | 66.2 °F | 86.1 °F | 5.36 in. |
| October | 55.2 °F | 78.6 °F | 4.09 in. |
| November | 44.7 °F | 69.4 °F | 2.96 in. |
| December | 39.5 °F | 62.9 °F | 3.93 in. |
| Annual | 54.1 °F | 77.3 °F | 52.44 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |