Kingsport, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.7 °C (low) to 20.3 °C (high). Annual precipitation averages 1142.2 Millimeters. Kingsport 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 | -2.9 °C | 7.9 °C | 94.49 mm |
| February | -1.5 °C | 10.3 °C | 101.6 mm |
| March | 2.2 °C | 15.3 °C | 106.17 mm |
| April | 7 °C | 21.2 °C | 101.85 mm |
| May | 12 °C | 25.4 °C | 94.23 mm |
| June | 16.5 °C | 28.9 °C | 95 mm |
| July | 18.8 °C | 30.6 °C | 122.43 mm |
| August | 18 °C | 30.1 °C | 97.79 mm |
| September | 14.4 °C | 27.3 °C | 79.25 mm |
| October | 7.6 °C | 21.8 °C | 60.2 mm |
| November | 1.6 °C | 15.1 °C | 78.99 mm |
| December | -1.2 °C | 9.7 °C | 110.24 mm |
| Annual | 7.7 °C | 20.3 °C | 1142.24 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |