Bull Run, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.2 °F (low) to 66.6 °F (high). Annual precipitation averages 42.3 Inches. Bull Run is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.6 °F | 43.6 °F | 2.84 in. |
| February | 26.0 °F | 46.7 °F | 2.47 in. |
| March | 33.1 °F | 55.3 °F | 3.48 in. |
| April | 43.1 °F | 67.1 °F | 2.99 in. |
| May | 53.0 °F | 75.1 °F | 4.11 in. |
| June | 62.3 °F | 83.8 °F | 4.36 in. |
| July | 67.0 °F | 88.2 °F | 4.01 in. |
| August | 65.0 °F | 86.3 °F | 3.68 in. |
| September | 58.3 °F | 79.9 °F | 4.28 in. |
| October | 45.7 °F | 68.3 °F | 3.55 in. |
| November | 35.0 °F | 57.3 °F | 3.13 in. |
| December | 28.7 °F | 47.4 °F | 3.37 in. |
| Annual | 45.2 °F | 66.6 °F | 42.27 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |