Clayton, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.2 °F (low) to 76.1 °F (high). Annual precipitation averages 55.8 Inches. Clayton 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 | 35.6 °F | 58.3 °F | 4.89 in. |
| February | 38.9 °F | 62.2 °F | 4.83 in. |
| March | 44.6 °F | 69.5 °F | 5.23 in. |
| April | 51.0 °F | 76.5 °F | 4.38 in. |
| May | 60.0 °F | 83.9 °F | 3.48 in. |
| June | 67.1 °F | 88.8 °F | 5.43 in. |
| July | 70.2 °F | 91.1 °F | 6.12 in. |
| August | 69.3 °F | 90.4 °F | 4.9 in. |
| September | 64.5 °F | 86.1 °F | 4.04 in. |
| October | 54.3 °F | 77.9 °F | 2.88 in. |
| November | 43.8 °F | 67.9 °F | 4.02 in. |
| December | 38.6 °F | 60.5 °F | 5.55 in. |
| Annual | 53.2 °F | 76.1 °F | 55.75 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |