Bethune, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.6 °C (low) to 23.5 °C (high). Annual precipitation averages 1175.3 Millimeters. Bethune is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.3 °C | 12.9 °C | 94.74 mm |
| February | 1.4 °C | 14.9 °C | 85.09 mm |
| March | 4.8 °C | 19.2 °C | 93.47 mm |
| April | 9.7 °C | 24.2 °C | 80.26 mm |
| May | 14.7 °C | 27.9 °C | 87.63 mm |
| June | 19.3 °C | 31.6 °C | 114.05 mm |
| July | 21.2 °C | 33.1 °C | 120.9 mm |
| August | 20.7 °C | 32.2 °C | 124.97 mm |
| September | 17.4 °C | 29.3 °C | 114.05 mm |
| October | 10.7 °C | 24 °C | 86.11 mm |
| November | 4.7 °C | 18.5 °C | 77.22 mm |
| December | 1.7 °C | 14.3 °C | 96.77 mm |
| Annual | 10.6 °C | 23.5 °C | 1175.26 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |