Haymarket, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 44.7 °F (low) to 66.2 °F (high). Annual precipitation averages 43.8 Inches. Haymarket is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.4 °F | 43.3 °F | 2.98 in. |
| February | 25.8 °F | 46.3 °F | 2.54 in. |
| March | 32.7 °F | 54.8 °F | 3.66 in. |
| April | 42.7 °F | 66.7 °F | 3.3 in. |
| May | 52.5 °F | 74.6 °F | 4.38 in. |
| June | 61.6 °F | 83.3 °F | 4.46 in. |
| July | 66.3 °F | 87.6 °F | 4.17 in. |
| August | 64.4 °F | 85.9 °F | 3.57 in. |
| September | 57.5 °F | 79.6 °F | 4.42 in. |
| October | 45.1 °F | 68.2 °F | 3.68 in. |
| November | 35.0 °F | 57.0 °F | 3.18 in. |
| December | 28.4 °F | 47.1 °F | 3.49 in. |
| Annual | 44.7 °F | 66.2 °F | 43.83 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |