Clarington, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 42.2 °F (low) to 63.8 °F (high). Annual precipitation averages 47.7 Inches. Clarington is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.6 °F | 39.1 °F | 3.72 in. |
| February | 23.3 °F | 42.4 °F | 3.3 in. |
| March | 29.9 °F | 51.9 °F | 4.22 in. |
| April | 39.8 °F | 65.7 °F | 4.1 in. |
| May | 50.1 °F | 74.1 °F | 4.86 in. |
| June | 59.1 °F | 81.7 °F | 4.79 in. |
| July | 63.4 °F | 84.9 °F | 4.58 in. |
| August | 62.1 °F | 84.1 °F | 3.87 in. |
| September | 54.9 °F | 78.3 °F | 3.85 in. |
| October | 42.9 °F | 66.7 °F | 3.35 in. |
| November | 32.9 °F | 53.9 °F | 3.36 in. |
| December | 26.7 °F | 43.3 °F | 3.69 in. |
| Annual | 42.2 °F | 63.8 °F | 47.69 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Dfb - Humid Continental Mild Summer, Wet All Year |