Dayton, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.6 °F (low) to 70.3 °F (high). Annual precipitation averages 60.2 Inches. Dayton is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.6 °F | 48.6 °F | 5.27 in. |
| February | 31.2 °F | 53.0 °F | 5.09 in. |
| March | 37.5 °F | 61.8 °F | 5.37 in. |
| April | 45.6 °F | 71.4 °F | 5.44 in. |
| May | 55.6 °F | 78.9 °F | 4.95 in. |
| June | 63.5 °F | 85.6 °F | 4.48 in. |
| July | 67.9 °F | 88.4 °F | 5.85 in. |
| August | 66.7 °F | 88.4 °F | 4.1 in. |
| September | 59.8 °F | 82.9 °F | 4.96 in. |
| October | 47.6 °F | 72.3 °F | 3.6 in. |
| November | 36.2 °F | 60.8 °F | 4.89 in. |
| December | 31.4 °F | 51.3 °F | 6.15 in. |
| Annual | 47.6 °F | 70.3 °F | 60.15 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |