| 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: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 37760 - Jefferson City, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 29 | 36 | 44 | 53 | 61 | 66 | 64 | 58 | 44 | 37 | 30 | 46 |
| Avg Max Temp (°F) | 45 | 50 | 60 | 69 | 76 | 83 | 86 | 86 | 81 | 70 | 59 | 49 | 68 |
| Avg Precip (In.) | 4.29 | 3.81 | 4.66 | 3.84 | 4.8 | 4.11 | 4.34 | 3.58 | 3.22 | 2.62 | 3.66 | 4.16 | 47.09 |