Clifton Forge, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6.1 °C (low) to 19.6 °C (high). Annual precipitation averages 1048.5 Millimeters. Clifton Forge is located in USDA Plant Hardiness Zone 7a. 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 | -4.3 °C | 6.8 °C | 77.72 mm |
| February | -3.4 °C | 9.2 °C | 70.87 mm |
| March | 0 °C | 14 °C | 94.23 mm |
| April | 5.1 °C | 20.6 °C | 94.49 mm |
| May | 10.3 °C | 24.8 °C | 104.39 mm |
| June | 15 °C | 28.6 °C | 111 mm |
| July | 17.2 °C | 30.6 °C | 92.2 mm |
| August | 16.6 °C | 29.7 °C | 79.76 mm |
| September | 12.9 °C | 26.4 °C | 85.09 mm |
| October | 6.3 °C | 20.7 °C | 77.98 mm |
| November | 0.3 °C | 14.4 °C | 75.95 mm |
| December | -2.7 °C | 8.9 °C | 84.84 mm |
| Annual | 6.1 °C | 19.6 °C | 1048.52 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |