Clarksville, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.5 °C (low) to 21.1 °C (high). Annual precipitation averages 1187.2 Millimeters. Clarksville is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.4 °C | 9.6 °C | 87.38 mm |
| February | -1.4 °C | 11.6 °C | 72.9 mm |
| March | 2.3 °C | 15.9 °C | 104.9 mm |
| April | 7.5 °C | 21.7 °C | 86.11 mm |
| May | 13 °C | 25.6 °C | 110.49 mm |
| June | 17.7 °C | 29.7 °C | 125.73 mm |
| July | 20.1 °C | 31.8 °C | 121.41 mm |
| August | 19.2 °C | 30.7 °C | 93.73 mm |
| September | 15.7 °C | 27.4 °C | 121.41 mm |
| October | 8.3 °C | 21.7 °C | 89.92 mm |
| November | 2.4 °C | 16.1 °C | 82.3 mm |
| December | -0.6 °C | 11.3 °C | 90.93 mm |
| Annual | 8.5 °C | 21.1 °C | 1187.21 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 |