Freeport, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.1 °C (low) to 16.5 °C (high). Annual precipitation averages 1076.2 Millimeters. Freeport 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.7 °C | 2.5 °C | 78.99 mm |
| February | -5.9 °C | 4.2 °C | 60.96 mm |
| March | -1.7 °C | 9.7 °C | 86.61 mm |
| April | 3.9 °C | 17.1 °C | 99.06 mm |
| May | 9.8 °C | 22.4 °C | 109.22 mm |
| June | 14.7 °C | 26.7 °C | 122.68 mm |
| July | 16.8 °C | 28.7 °C | 102.87 mm |
| August | 15.9 °C | 28.1 °C | 103.12 mm |
| September | 11.9 °C | 24.8 °C | 85.34 mm |
| October | 5.6 °C | 18 °C | 76.45 mm |
| November | 0.3 °C | 11.1 °C | 73.41 mm |
| December | -3.6 °C | 5.1 °C | 77.47 mm |
| Annual | 5.1 °C | 16.5 °C | 1076.18 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 |