Bluffton, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 58 °F (low) to 76.2 °F (high). Annual precipitation averages 53.2 Inches. Bluffton 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 | 40.4 °F | 60.0 °F | 3.65 in. |
| February | 43.0 °F | 63.1 °F | 3.59 in. |
| March | 49.2 °F | 69.3 °F | 3.19 in. |
| April | 56.6 °F | 76.3 °F | 3.15 in. |
| May | 64.9 °F | 83.0 °F | 2.96 in. |
| June | 71.6 °F | 88.0 °F | 5.6 in. |
| July | 74.5 °F | 90.8 °F | 6.37 in. |
| August | 73.9 °F | 89.3 °F | 8.07 in. |
| September | 69.7 °F | 85.2 °F | 5.64 in. |
| October | 59.9 °F | 77.9 °F | 4.46 in. |
| November | 49.3 °F | 68.9 °F | 2.91 in. |
| December | 43.5 °F | 62.6 °F | 3.64 in. |
| Annual | 58 °F | 76.2 °F | 53.23 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 |