Clayton, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.8 °C (low) to 16.5 °C (high). Annual precipitation averages 1050 Millimeters. Clayton is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.8 °C | 1.9 °C | 77.98 mm |
| February | -5.5 °C | 4.1 °C | 59.18 mm |
| March | -0.9 °C | 9.7 °C | 84.84 mm |
| April | 5 °C | 16.8 °C | 108.71 mm |
| May | 11.1 °C | 22.5 °C | 115.32 mm |
| June | 16.2 °C | 27.2 °C | 113.28 mm |
| July | 17.8 °C | 28.9 °C | 103.63 mm |
| August | 16.7 °C | 28.4 °C | 76.96 mm |
| September | 12.6 °C | 25.1 °C | 79.25 mm |
| October | 6.3 °C | 18.3 °C | 74.17 mm |
| November | 0.6 °C | 10.7 °C | 77.72 mm |
| December | -3.8 °C | 4.4 °C | 78.99 mm |
| Annual | 5.8 °C | 16.5 °C | 1050.03 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |