Bluffton, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.5 °C (low) to 24.6 °C (high). Annual precipitation averages 1352.1 Millimeters. 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 | 4.7 °C | 15.6 °C | 92.71 mm |
| February | 6.1 °C | 17.3 °C | 91.19 mm |
| March | 9.6 °C | 20.7 °C | 81.03 mm |
| April | 13.7 °C | 24.6 °C | 80.01 mm |
| May | 18.3 °C | 28.3 °C | 75.18 mm |
| June | 22 °C | 31.1 °C | 142.24 mm |
| July | 23.6 °C | 32.7 °C | 161.8 mm |
| August | 23.3 °C | 31.8 °C | 204.98 mm |
| September | 20.9 °C | 29.6 °C | 143.26 mm |
| October | 15.5 °C | 25.5 °C | 113.28 mm |
| November | 9.6 °C | 20.5 °C | 73.91 mm |
| December | 6.4 °C | 17 °C | 92.46 mm |
| Annual | 14.5 °C | 24.6 °C | 1352.05 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |