Clayton, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.1 °F (low) to 77 °F (high). Annual precipitation averages 60.1 Inches. Clayton is located in USDA Plant Hardiness Zone 9a. 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 | 37.6 °F | 57.9 °F | 5.89 in. |
| February | 39.9 °F | 62.4 °F | 5.39 in. |
| March | 47.6 °F | 70.1 °F | 5.58 in. |
| April | 54.6 °F | 77.1 °F | 5.47 in. |
| May | 63.1 °F | 84.5 °F | 4.73 in. |
| June | 70.1 °F | 89.9 °F | 4.97 in. |
| July | 72.5 °F | 92.0 °F | 4.69 in. |
| August | 71.5 °F | 92.6 °F | 4.4 in. |
| September | 66.0 °F | 88.2 °F | 4.12 in. |
| October | 54.4 °F | 79.8 °F | 4.22 in. |
| November | 44.9 °F | 68.7 °F | 5.14 in. |
| December | 39.5 °F | 60.3 °F | 5.54 in. |
| Annual | 55.1 °F | 77 °F | 60.14 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 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |