| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F 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: | Nov. 1 - Nov. 10 |
| Average Last Frost Date: | Apr. 1 - Apr. 10 |
| 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 37774 - Loudon, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 29 | 37 | 45 | 54 | 63 | 67 | 66 | 59 | 46 | 37 | 30 | 47 |
| Avg Max Temp (°F) | 47 | 52 | 61 | 70 | 78 | 85 | 89 | 88 | 82 | 72 | 60 | 51 | 69 |
| Avg Precip (In.) | 5.18 | 4.59 | 5.8 | 4.38 | 5.02 | 4.29 | 4.59 | 3.63 | 3.39 | 3.08 | 4.4 | 5.15 | 53.49 |