| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 67f - Southern Limestone/Dolomite Valleys and Low Rolling Hills |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 37664 - Kingsport, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 25 | 28 | 35 | 42 | 52 | 60 | 64 | 63 | 56 | 43 | 35 | 28 | 44 |
| Avg Max Temp (°F) | 45 | 50 | 59 | 68 | 76 | 83 | 86 | 85 | 80 | 70 | 59 | 49 | 67 |
| Avg Precip (In.) | 3.83 | 3.64 | 4.15 | 3.37 | 4.47 | 3.99 | 4.57 | 3.58 | 3.13 | 2.58 | 3.21 | 3.53 | 44.04 |