| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°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: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 71f - Western Highland Rim |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 38483 - Summertown, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 29 | 38 | 45 | 54 | 62 | 67 | 65 | 58 | 45 | 37 | 30 | 46 |
| Avg Max Temp (°F) | 47 | 52 | 61 | 71 | 78 | 86 | 89 | 89 | 83 | 72 | 61 | 51 | 70 |
| Avg Precip (In.) | 4.82 | 4.53 | 6.34 | 4.93 | 5.79 | 4.29 | 4.89 | 3.45 | 4.22 | 3.5 | 5.25 | 5.55 | 57.57 |