Clintwood, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 5.5 °C (low) to 18.3 °C (high). Annual precipitation averages 1257.3 Millimeters. Clintwood is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.3 °C | 5.9 °C | 98.81 mm |
| February | -3.9 °C | 8.2 °C | 101.6 mm |
| March | -0.4 °C | 13.3 °C | 109.47 mm |
| April | 4.4 °C | 19.7 °C | 119.13 mm |
| May | 9.7 °C | 23.6 °C | 128.52 mm |
| June | 14.6 °C | 26.9 °C | 129.29 mm |
| July | 16.6 °C | 28.5 °C | 136.14 mm |
| August | 16.1 °C | 27.8 °C | 99.82 mm |
| September | 12.4 °C | 25.4 °C | 84.58 mm |
| October | 5.4 °C | 19.5 °C | 73.91 mm |
| November | -0.4 °C | 13.2 °C | 71.63 mm |
| December | -3.2 °C | 8.1 °C | 104.39 mm |
| Annual | 5.5 °C | 18.3 °C | 1257.29 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |