| 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: | 67g - Southern Shale Valleys |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 37660 - Kingsport, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 26 | 28 | 35 | 43 | 52 | 61 | 65 | 63 | 57 | 44 | 36 | 29 | 45 |
| Avg Max Temp (°F) | 45 | 50 | 60 | 69 | 77 | 83 | 87 | 85 | 80 | 70 | 59 | 49 | 68 |
| Avg Precip (In.) | 3.86 | 3.67 | 4.18 | 3.38 | 4.51 | 4.01 | 4.6 | 3.65 | 3.14 | 2.62 | 3.22 | 3.55 | 44.39 |