| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F |
| 2012 Hardiness Zone: | 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. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 67f - Southern Limestone/Dolomite Valleys and Low Rolling Hills |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 37814 - Morristown, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 25 | 27 | 35 | 42 | 51 | 60 | 64 | 63 | 56 | 43 | 35 | 28 | 44 |
| Avg Max Temp (°F) | 46 | 51 | 60 | 69 | 76 | 83 | 87 | 86 | 80 | 70 | 59 | 49 | 68 |
| Avg Precip (In.) | 4.11 | 3.66 | 4.47 | 3.83 | 4.8 | 3.94 | 4.34 | 3.67 | 3.24 | 2.55 | 3.48 | 3.99 | 46.08 |