Port Clinton, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.8 °C (low) to 16.7 °C (high). Annual precipitation averages 1340.4 Millimeters. Port Clinton is located in USDA Plant Hardiness Zone 7a. 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 | -6.8 °C | 3.1 °C | 99.06 mm |
| February | -6.2 °C | 4.6 °C | 74.17 mm |
| March | -1.9 °C | 9.3 °C | 103.89 mm |
| April | 3.6 °C | 16.6 °C | 106.43 mm |
| May | 9.1 °C | 22.2 °C | 108.2 mm |
| June | 14.2 °C | 26.9 °C | 137.41 mm |
| July | 16.7 °C | 29.5 °C | 134.11 mm |
| August | 15.7 °C | 28.6 °C | 120.14 mm |
| September | 11.6 °C | 24.7 °C | 138.94 mm |
| October | 5.2 °C | 18.2 °C | 117.86 mm |
| November | 0.1 °C | 11.5 °C | 94.49 mm |
| December | -3.8 °C | 5.7 °C | 105.66 mm |
| Annual | 4.8 °C | 16.7 °C | 1340.36 mm |
| 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 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |