Clay Center, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42 °F (low) to 59.6 °F (high). Annual precipitation averages 36 Inches. Clay Center is located in USDA Plant Hardiness Zone 6b. 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 | 18.8 °F | 33.0 °F | 2.39 in. |
| February | 20.3 °F | 35.9 °F | 2.19 in. |
| March | 28.2 °F | 45.6 °F | 2.63 in. |
| April | 39.2 °F | 58.4 °F | 3.75 in. |
| May | 50.9 °F | 70.1 °F | 3.54 in. |
| June | 61.0 °F | 80.2 °F | 3.57 in. |
| July | 64.6 °F | 84.2 °F | 3.4 in. |
| August | 62.9 °F | 81.8 °F | 3.29 in. |
| September | 56.0 °F | 75.9 °F | 3.12 in. |
| October | 43.6 °F | 63.2 °F | 2.93 in. |
| November | 33.3 °F | 49.4 °F | 2.81 in. |
| December | 24.8 °F | 37.9 °F | 2.42 in. |
| Annual | 42 °F | 59.6 °F | 36.04 in. |
| 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |