Leesburg, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6 °C (low) to 16.9 °C (high). Annual precipitation averages 1109 Millimeters. Leesburg is located in USDA Plant Hardiness Zone 6b. 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 | -5.9 °C | 2.9 °C | 79.5 mm |
| February | -4.8 °C | 4.9 °C | 71.63 mm |
| March | -0.4 °C | 10.3 °C | 99.82 mm |
| April | 5.2 °C | 17.3 °C | 113.03 mm |
| May | 11.2 °C | 22.5 °C | 119.38 mm |
| June | 16.1 °C | 27.1 °C | 117.09 mm |
| July | 17.6 °C | 28.7 °C | 107.44 mm |
| August | 16.6 °C | 28.2 °C | 88.14 mm |
| September | 12.5 °C | 25.3 °C | 79.5 mm |
| October | 6.5 °C | 18.7 °C | 76.71 mm |
| November | 0.9 °C | 11.4 °C | 73.41 mm |
| December | -3.1 °C | 5.2 °C | 83.31 mm |
| Annual | 6 °C | 16.9 °C | 1108.96 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 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 |