Lebanon, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.3 °C (low) to 18.4 °C (high). Annual precipitation averages 695.2 Millimeters. Lebanon 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.4 °C | 3.3 °C | 17.02 mm |
| February | -7.6 °C | 5.9 °C | 20.32 mm |
| March | -2.4 °C | 12.3 °C | 38.35 mm |
| April | 3.2 °C | 18.3 °C | 59.44 mm |
| May | 9.6 °C | 23.7 °C | 103.89 mm |
| June | 15.8 °C | 29.8 °C | 94.49 mm |
| July | 18.5 °C | 32.6 °C | 115.06 mm |
| August | 17.3 °C | 31.1 °C | 88.65 mm |
| September | 11.9 °C | 27.1 °C | 55.12 mm |
| October | 4.4 °C | 19.8 °C | 49.28 mm |
| November | -2.6 °C | 11.6 °C | 30.99 mm |
| December | -7.7 °C | 4.8 °C | 22.61 mm |
| Annual | 4.3 °C | 18.4 °C | 695.22 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |