Clay, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.1 °F (low) to 72 °F (high). Annual precipitation averages 59.1 Inches. Clay is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 33.4 °F | 52.3 °F | 5.26 in. |
| February | 36.2 °F | 56.6 °F | 5.4 in. |
| March | 43.2 °F | 64.9 °F | 5.69 in. |
| April | 50.6 °F | 72.9 °F | 5.25 in. |
| May | 59.6 °F | 79.5 °F | 5.33 in. |
| June | 67.5 °F | 85.7 °F | 4.94 in. |
| July | 70.8 °F | 88.7 °F | 5.06 in. |
| August | 69.8 °F | 88.3 °F | 4.04 in. |
| September | 64.0 °F | 83.6 °F | 4.7 in. |
| October | 52.7 °F | 73.6 °F | 3.55 in. |
| November | 41.8 °F | 63.0 °F | 4.72 in. |
| December | 36.1 °F | 54.7 °F | 5.12 in. |
| Annual | 52.1 °F | 72 °F | 59.06 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |