Saltville, Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5.6 °C (low) to 19 °C (high). Annual precipitation averages 1221.2 Millimeters. Saltville is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.7 °C | 6.9 °C | 98.81 mm |
| February | -3.4 °C | 9.2 °C | 97.79 mm |
| March | 0 °C | 13.9 °C | 112.27 mm |
| April | 4.6 °C | 19.5 °C | 105.66 mm |
| May | 9.7 °C | 23.8 °C | 122.17 mm |
| June | 14.5 °C | 27.4 °C | 121.16 mm |
| July | 16.4 °C | 29 °C | 113.54 mm |
| August | 15.8 °C | 28.6 °C | 103.38 mm |
| September | 12.3 °C | 26.1 °C | 90.17 mm |
| October | 5.2 °C | 20.3 °C | 78.99 mm |
| November | -0.3 °C | 14.1 °C | 69.85 mm |
| December | -2.9 °C | 8.7 °C | 107.44 mm |
| Annual | 5.6 °C | 19 °C | 1221.23 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |