Lewisburg, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.6 °C (low) to 16.5 °C (high). Annual precipitation averages 1050.3 Millimeters. Lewisburg is located in USDA Plant Hardiness Zone 6a. 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 | -7 °C | 1.8 °C | 77.22 mm |
| February | -5.6 °C | 4.1 °C | 58.93 mm |
| March | -1.1 °C | 9.7 °C | 85.34 mm |
| April | 4.8 °C | 16.9 °C | 110.24 mm |
| May | 10.9 °C | 22.4 °C | 114.05 mm |
| June | 15.9 °C | 27.2 °C | 118.36 mm |
| July | 17.6 °C | 28.8 °C | 98.81 mm |
| August | 16.6 °C | 28.3 °C | 76.45 mm |
| September | 12.4 °C | 25.1 °C | 74.68 mm |
| October | 6.1 °C | 18.4 °C | 76.71 mm |
| November | 0.6 °C | 10.8 °C | 78.99 mm |
| December | -3.9 °C | 4.3 °C | 80.52 mm |
| Annual | 5.6 °C | 16.5 °C | 1050.3 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 6a : -23.3°C to -20.6°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 |