Hardeeville, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.3 °F (low) to 77.3 °F (high). Annual precipitation averages 52.3 Inches. Hardeeville is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.8 °F | 61.0 °F | 3.74 in. |
| February | 41.6 °F | 64.4 °F | 3.48 in. |
| March | 47.7 °F | 70.8 °F | 3.51 in. |
| April | 54.6 °F | 77.6 °F | 3.33 in. |
| May | 62.9 °F | 84.2 °F | 3.34 in. |
| June | 70.0 °F | 89.4 °F | 6.04 in. |
| July | 73.0 °F | 92.2 °F | 5.89 in. |
| August | 72.6 °F | 90.6 °F | 7.72 in. |
| September | 68.3 °F | 86.0 °F | 5.1 in. |
| October | 58.0 °F | 78.5 °F | 3.76 in. |
| November | 47.1 °F | 69.8 °F | 2.73 in. |
| December | 41.5 °F | 63.4 °F | 3.68 in. |
| Annual | 56.3 °F | 77.3 °F | 52.32 in. |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |