Clayton, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.9 °F (low) to 73.9 °F (high). Annual precipitation averages 52 Inches. Clayton is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 29.1 °F | 52.7 °F | 3.11 in. |
| February | 32.8 °F | 56.8 °F | 3.13 in. |
| March | 40.5 °F | 65.4 °F | 4.4 in. |
| April | 48.3 °F | 73.6 °F | 5.23 in. |
| May | 58.6 °F | 80.1 °F | 6.45 in. |
| June | 66.9 °F | 88.3 °F | 4.24 in. |
| July | 70.3 °F | 93.5 °F | 3.93 in. |
| August | 68.8 °F | 93.8 °F | 3.35 in. |
| September | 61.7 °F | 87.1 °F | 4.94 in. |
| October | 49.9 °F | 75.8 °F | 4.65 in. |
| November | 39.9 °F | 64.3 °F | 4.38 in. |
| December | 31.7 °F | 54.8 °F | 4.17 in. |
| Annual | 49.9 °F | 73.9 °F | 51.98 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |