Brunson, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.1 °C (low) to 24.8 °C (high). Annual precipitation averages 1236 Millimeters. Brunson is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.3 °C | 15.3 °C | 97.28 mm |
| February | 3.7 °C | 17.3 °C | 93.22 mm |
| March | 7 °C | 21.2 °C | 96.77 mm |
| April | 11.1 °C | 25.3 °C | 77.47 mm |
| May | 15.8 °C | 29 °C | 82.04 mm |
| June | 20.1 °C | 32 °C | 147.57 mm |
| July | 21.9 °C | 33.3 °C | 138.94 mm |
| August | 21.7 °C | 32.4 °C | 147.83 mm |
| September | 18.8 °C | 29.9 °C | 109.22 mm |
| October | 12.6 °C | 25.6 °C | 77.98 mm |
| November | 6.7 °C | 20.3 °C | 74.68 mm |
| December | 3.7 °C | 16.5 °C | 92.96 mm |
| Annual | 12.1 °C | 24.8 °C | 1235.96 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |