Dayton, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.2 °F (low) to 75.6 °F (high). Annual precipitation averages 55.1 Inches. Dayton is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.0 °F | 56.3 °F | 5.22 in. |
| February | 38.4 °F | 60.7 °F | 5.34 in. |
| March | 44.5 °F | 68.9 °F | 5.68 in. |
| April | 51.6 °F | 75.8 °F | 4.6 in. |
| May | 60.5 °F | 83.3 °F | 3.92 in. |
| June | 68.4 °F | 89.3 °F | 4.46 in. |
| July | 71.3 °F | 91.5 °F | 5.18 in. |
| August | 70.1 °F | 91.1 °F | 4.56 in. |
| September | 64.8 °F | 87.2 °F | 3.75 in. |
| October | 53.5 °F | 77.8 °F | 3.23 in. |
| November | 42.6 °F | 66.7 °F | 4.26 in. |
| December | 37.5 °F | 58.6 °F | 4.94 in. |
| Annual | 53.2 °F | 75.6 °F | 55.14 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |