Lebanon, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.4 °F (low) to 63.7 °F (high). Annual precipitation averages 43.1 Inches. Lebanon 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.8 °F | 38.1 °F | 3.21 in. |
| February | 23.8 °F | 42.0 °F | 2.64 in. |
| March | 31.7 °F | 52.0 °F | 3.76 in. |
| April | 42.0 °F | 64.4 °F | 4.51 in. |
| May | 52.6 °F | 74.2 °F | 4.73 in. |
| June | 61.5 °F | 82.0 °F | 4.54 in. |
| July | 64.9 °F | 85.5 °F | 4.05 in. |
| August | 63.0 °F | 84.7 °F | 3.32 in. |
| September | 55.4 °F | 79.1 °F | 2.89 in. |
| October | 43.7 °F | 66.9 °F | 3.06 in. |
| November | 33.5 °F | 53.5 °F | 3.07 in. |
| December | 26.7 °F | 42.4 °F | 3.36 in. |
| Annual | 43.4 °F | 63.7 °F | 43.14 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |