Brandermill, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.2 °C (low) to 20.7 °C (high). Annual precipitation averages 1175.3 Millimeters. Brandermill is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.9 °C | 8.9 °C | 88.9 mm |
| February | -2 °C | 10.8 °C | 69.34 mm |
| March | 1.7 °C | 15.2 °C | 104.65 mm |
| April | 7.4 °C | 21.2 °C | 87.12 mm |
| May | 12.7 °C | 25.1 °C | 103.12 mm |
| June | 17.6 °C | 29.4 °C | 103.89 mm |
| July | 19.7 °C | 31.8 °C | 114.3 mm |
| August | 19.1 °C | 30.7 °C | 116.84 mm |
| September | 15.4 °C | 27.4 °C | 118.87 mm |
| October | 8.6 °C | 21.7 °C | 91.95 mm |
| November | 2.6 °C | 15.8 °C | 84.58 mm |
| December | -1.1 °C | 10.8 °C | 91.69 mm |
| Annual | 8.2 °C | 20.7 °C | 1175.25 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |