Port Clinton, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.5 °C (low) to 14.9 °C (high). Annual precipitation averages 921.3 Millimeters. Port Clinton is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.8 °C | 0.6 °C | 59.44 mm |
| February | -6.1 °C | 2 °C | 50.04 mm |
| March | -1.7 °C | 6.9 °C | 60.96 mm |
| April | 4.3 °C | 14.1 °C | 95 mm |
| May | 11.1 °C | 20.3 °C | 90.68 mm |
| June | 16.9 °C | 25.8 °C | 95.5 mm |
| July | 19.2 °C | 28.1 °C | 87.38 mm |
| August | 18.5 °C | 27 °C | 88.39 mm |
| September | 14.8 °C | 23.7 °C | 83.57 mm |
| October | 8.2 °C | 17.3 °C | 78.23 mm |
| November | 2.2 °C | 9.6 °C | 70.1 mm |
| December | -3.1 °C | 3.4 °C | 61.98 mm |
| Annual | 6.5 °C | 14.9 °C | 921.27 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |