Clinton, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.9 °C (low) to 15.7 °C (high). Annual precipitation averages 1014.5 Millimeters. 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 | -6.9 °C | 1.3 °C | 70.61 mm |
| February | -6.3 °C | 2.9 °C | 53.34 mm |
| March | -2.2 °C | 8.2 °C | 76.2 mm |
| April | 3.7 °C | 15.8 °C | 92.96 mm |
| May | 9.7 °C | 21.7 °C | 101.35 mm |
| June | 14.6 °C | 26.4 °C | 108.71 mm |
| July | 16.8 °C | 28.4 °C | 103.12 mm |
| August | 15.8 °C | 27.7 °C | 96.01 mm |
| September | 11.7 °C | 24.2 °C | 88.14 mm |
| October | 5.7 °C | 17.3 °C | 81.28 mm |
| November | 0.4 °C | 10.2 °C | 72.64 mm |
| December | -3.7 °C | 4 °C | 70.1 mm |
| Annual | 4.9 °C | 15.7 °C | 1014.46 mm |
| 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 : -20.6°C to -17.8°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 |