Harborton, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.9 °F (low) to 67.3 °F (high). Annual precipitation averages 46.8 Inches. Harborton is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.2 °F | 47.2 °F | 3.46 in. |
| February | 32.3 °F | 49.2 °F | 3.05 in. |
| March | 38.4 °F | 55.3 °F | 4.03 in. |
| April | 47.8 °F | 66.0 °F | 3.38 in. |
| May | 57.4 °F | 74.4 °F | 3.62 in. |
| June | 66.4 °F | 82.7 °F | 4.13 in. |
| July | 71.4 °F | 87.0 °F | 4.71 in. |
| August | 69.8 °F | 84.9 °F | 4.62 in. |
| September | 64.4 °F | 79.8 °F | 4.33 in. |
| October | 53.3 °F | 70.1 °F | 4.3 in. |
| November | 42.6 °F | 59.6 °F | 3.26 in. |
| December | 35.6 °F | 51.4 °F | 3.91 in. |
| Annual | 50.9 °F | 67.3 °F | 46.8 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |