| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F 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 7b: 5°F to 10°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: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 68b - Sequatchie Valley |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 37327 - Dunlap, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 30 | 37 | 44 | 53 | 61 | 66 | 64 | 58 | 45 | 37 | 30 | 46 |
| Avg Max Temp (°F) | 47 | 53 | 62 | 71 | 77 | 84 | 88 | 87 | 81 | 71 | 60 | 51 | 69 |
| Avg Precip (In.) | 5.4 | 4.71 | 6.16 | 4.17 | 4.7 | 4.14 | 4.43 | 3.58 | 4.26 | 3.37 | 4.89 | 5.27 | 55.1 |