| 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 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: | 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: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 37321 - Dayton, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 29 | 37 | 44 | 53 | 62 | 66 | 65 | 59 | 46 | 37 | 30 | 46 |
| Avg Max Temp (°F) | 46 | 52 | 61 | 70 | 77 | 84 | 87 | 87 | 81 | 70 | 59 | 49 | 69 |
| Avg Precip (In.) | 5.48 | 4.78 | 6.3 | 4.52 | 5.35 | 4.13 | 4.55 | 3.95 | 4.52 | 3.44 | 5.16 | 5.62 | 57.83 |