Lebanon, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.8 °F (low) to 66.5 °F (high). Annual precipitation averages 45.4 Inches. Lebanon is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.4 °F | 42.1 °F | 2.7 in. |
| February | 27.3 °F | 47.3 °F | 2.66 in. |
| March | 35.2 °F | 56.7 °F | 3.68 in. |
| April | 45.0 °F | 67.5 °F | 4.63 in. |
| May | 54.6 °F | 75.7 °F | 5.33 in. |
| June | 63.2 °F | 83.4 °F | 4.44 in. |
| July | 67.4 °F | 87.9 °F | 4.04 in. |
| August | 65.6 °F | 87.4 °F | 3.93 in. |
| September | 57.3 °F | 79.8 °F | 4.37 in. |
| October | 46.2 °F | 68.8 °F | 3.32 in. |
| November | 36.1 °F | 55.7 °F | 3.66 in. |
| December | 27.8 °F | 45.4 °F | 2.62 in. |
| Annual | 45.8 °F | 66.5 °F | 45.38 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |