Clayton, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10 °C (low) to 21.7 °C (high). Annual precipitation averages 1255.5 Millimeters. Clayton is located in USDA Plant Hardiness Zone 8a. 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 | -0.7 °C | 10.8 °C | 92.96 mm |
| February | 0.4 °C | 12.9 °C | 75.44 mm |
| March | 4.1 °C | 17.1 °C | 101.6 mm |
| April | 8.9 °C | 22.2 °C | 93.47 mm |
| May | 14.3 °C | 26 °C | 95.25 mm |
| June | 18.8 °C | 29.8 °C | 108.2 mm |
| July | 21.2 °C | 31.7 °C | 142.75 mm |
| August | 20.3 °C | 30.7 °C | 131.83 mm |
| September | 17.2 °C | 27.7 °C | 147.83 mm |
| October | 10.1 °C | 22.4 °C | 87.63 mm |
| November | 4.1 °C | 17 °C | 87.12 mm |
| December | 1 °C | 12.4 °C | 91.44 mm |
| Annual | 10 °C | 21.7 °C | 1255.52 mm |
| 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 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |