| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 68a - Cumberland Plateau |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 38556 - Jamestown, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 25 | 28 | 36 | 43 | 51 | 59 | 64 | 62 | 56 | 44 | 36 | 29 | 44 |
| Avg Max Temp (°F) | 44 | 49 | 58 | 67 | 74 | 81 | 84 | 83 | 78 | 68 | 57 | 47 | 66 |
| Avg Precip (In.) | 4.96 | 4.21 | 5.55 | 4.26 | 5.66 | 5.04 | 4.84 | 4.47 | 3.96 | 3.25 | 4.59 | 5.19 | 55.97 |