| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F 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: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 66f - Limestone Valleys and Coves | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 37692 - Unicoi, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 24 | 26 | 33 | 40 | 48 | 57 | 61 | 60 | 54 | 41 | 33 | 27 | 42 |
| Avg Max Temp (°F) | 46 | 51 | 60 | 69 | 76 | 82 | 85 | 84 | 79 | 69 | 59 | 50 | 67 |
| Avg Precip (In.) | 3.59 | 3.56 | 4.45 | 3.92 | 5.34 | 4.74 | 5.72 | 3.94 | 3.54 | 2.35 | 3.1 | 3.29 | 47.54 |