| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F 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 37381 - Spring City, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 26 | 28 | 36 | 43 | 52 | 60 | 65 | 63 | 57 | 44 | 36 | 29 | 45 |
| Avg Max Temp (°F) | 46 | 51 | 60 | 69 | 76 | 83 | 87 | 86 | 80 | 70 | 59 | 49 | 68 |
| Avg Precip (In.) | 5.54 | 4.81 | 6.21 | 4.52 | 5.41 | 4.5 | 4.87 | 3.97 | 4.06 | 3.37 | 5.1 | 5.62 | 57.98 |