Clinton, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.9 °F (low) to 60.2 °F (high). Annual precipitation averages 39.9 Inches. Clinton is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.6 °F | 34.4 °F | 2.78 in. |
| February | 20.7 °F | 37.2 °F | 2.1 in. |
| March | 28.1 °F | 46.8 °F | 3.0 in. |
| April | 38.6 °F | 60.5 °F | 3.66 in. |
| May | 49.4 °F | 71.1 °F | 3.99 in. |
| June | 58.2 °F | 79.6 °F | 4.28 in. |
| July | 62.2 °F | 83.1 °F | 4.06 in. |
| August | 60.4 °F | 81.9 °F | 3.78 in. |
| September | 53.1 °F | 75.6 °F | 3.47 in. |
| October | 42.2 °F | 63.2 °F | 3.2 in. |
| November | 32.7 °F | 50.3 °F | 2.86 in. |
| December | 25.3 °F | 39.2 °F | 2.76 in. |
| Annual | 40.9 °F | 60.2 °F | 39.94 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |