Branchville, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.1 °C (low) to 21.7 °C (high). Annual precipitation averages 1266.7 Millimeters. Branchville 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 Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.3 °C | 10.4 °C | 93.73 mm |
| February | -0.6 °C | 12.3 °C | 68.58 mm |
| March | 2.9 °C | 16.2 °C | 108.71 mm |
| April | 8.2 °C | 22.2 °C | 88.65 mm |
| May | 13.3 °C | 26.1 °C | 94.49 mm |
| June | 18.2 °C | 30.3 °C | 130.81 mm |
| July | 20.4 °C | 32.2 °C | 136.65 mm |
| August | 19.4 °C | 31.2 °C | 129.03 mm |
| September | 16.2 °C | 28.1 °C | 146.56 mm |
| October | 9.1 °C | 22.7 °C | 95 mm |
| November | 3.4 °C | 16.9 °C | 84.33 mm |
| December | 0.4 °C | 12.3 °C | 90.17 mm |
| Annual | 9.1 °C | 21.7 °C | 1266.71 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |