| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F |
| 2012 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F |
| 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: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 37804 - Maryville, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 28 | 31 | 38 | 46 | 55 | 63 | 68 | 66 | 60 | 47 | 38 | 31 | 48 |
| Avg Max Temp (°F) | 46 | 51 | 61 | 70 | 77 | 84 | 87 | 87 | 81 | 70 | 59 | 50 | 69 |
| Avg Precip (In.) | 4.62 | 4.02 | 5.17 | 3.93 | 4.67 | 4.17 | 4.57 | 3.02 | 3.1 | 2.69 | 3.99 | 4.51 | 48.46 |