Stanleytown, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.3 °C (low) to 20.6 °C (high). Annual precipitation averages 1210.3 Millimeters. Stanleytown is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.3 °C | 9.1 °C | 96.01 mm |
| February | -2.3 °C | 11.1 °C | 78.74 mm |
| March | 1.3 °C | 15.5 °C | 105.66 mm |
| April | 6.3 °C | 21.2 °C | 89.92 mm |
| May | 11.6 °C | 25.2 °C | 109.73 mm |
| June | 16.3 °C | 29.2 °C | 110.74 mm |
| July | 18.8 °C | 31.1 °C | 114.81 mm |
| August | 18 °C | 30.2 °C | 109.47 mm |
| September | 14.2 °C | 26.8 °C | 133.1 mm |
| October | 7.2 °C | 21.7 °C | 88.39 mm |
| November | 1.2 °C | 15.7 °C | 82.04 mm |
| December | -1.8 °C | 10.7 °C | 91.69 mm |
| Annual | 7.3 °C | 20.6 °C | 1210.3 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |