| 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. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 67f - Southern Limestone/Dolomite Valleys and Low Rolling Hills |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 37918 - Knoxville, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 29 | 37 | 45 | 54 | 62 | 66 | 65 | 59 | 46 | 38 | 30 | 47 |
| Avg Max Temp (°F) | 46 | 51 | 60 | 70 | 77 | 84 | 87 | 86 | 81 | 70 | 59 | 50 | 68 |
| Avg Precip (In.) | 4.84 | 4.1 | 5.3 | 4.04 | 4.79 | 4.73 | 4.46 | 3.6 | 3.41 | 3.01 | 4.39 | 4.69 | 51.36 |