Hillsboro, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 43.1 °F (low) to 64.8 °F (high). Annual precipitation averages 43.1 Inches. Hillsboro 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 | 23.2 °F | 41.4 °F | 3.02 in. |
| February | 25.1 °F | 44.7 °F | 2.37 in. |
| March | 31.4 °F | 53.0 °F | 3.63 in. |
| April | 41.0 °F | 65.2 °F | 3.56 in. |
| May | 50.7 °F | 73.9 °F | 4.5 in. |
| June | 59.4 °F | 82.0 °F | 4.21 in. |
| July | 64.2 °F | 86.5 °F | 3.95 in. |
| August | 62.0 °F | 84.8 °F | 3.25 in. |
| September | 55.2 °F | 78.1 °F | 4.66 in. |
| October | 43.3 °F | 67.0 °F | 3.46 in. |
| November | 34.4 °F | 55.3 °F | 3.03 in. |
| December | 26.9 °F | 45.1 °F | 3.47 in. |
| Annual | 43.1 °F | 64.8 °F | 43.11 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 |