Halifax, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.9 °C (low) to 20.9 °C (high). Annual precipitation averages 1179.3 Millimeters. Halifax is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.8 °C | 9.2 °C | 91.44 mm |
| February | -1.9 °C | 11.2 °C | 71.63 mm |
| March | 1.7 °C | 15.7 °C | 107.95 mm |
| April | 7 °C | 21.4 °C | 98.81 mm |
| May | 12.3 °C | 25.4 °C | 105.41 mm |
| June | 17.1 °C | 29.6 °C | 121.16 mm |
| July | 19.4 °C | 31.5 °C | 102.62 mm |
| August | 18.5 °C | 30.6 °C | 86.61 mm |
| September | 14.9 °C | 27.3 °C | 123.95 mm |
| October | 7.8 °C | 21.6 °C | 94.74 mm |
| November | 1.7 °C | 15.9 °C | 84.58 mm |
| December | -1.1 °C | 10.9 °C | 90.42 mm |
| Annual | 7.9 °C | 20.9 °C | 1179.32 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |