Lebanon, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.5 °C (low) to 13.2 °C (high). Annual precipitation averages 891.5 Millimeters. Lebanon is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.1 °C | -3.1 °C | 37.59 mm |
| February | -10.8 °C | -1.1 °C | 36.58 mm |
| March | -4.8 °C | 5.6 °C | 48.01 mm |
| April | 1.7 °C | 13.1 °C | 91.69 mm |
| May | 8.1 °C | 19.9 °C | 99.06 mm |
| June | 13.6 °C | 25.3 °C | 127.25 mm |
| July | 15.9 °C | 27.4 °C | 103.89 mm |
| August | 14.7 °C | 26.3 °C | 99.06 mm |
| September | 10.2 °C | 22.8 °C | 81.53 mm |
| October | 3.9 °C | 15.3 °C | 73.15 mm |
| November | -2.3 °C | 7.2 °C | 51.56 mm |
| December | -8.3 °C | 0 °C | 42.16 mm |
| Annual | 2.5 °C | 13.2 °C | 891.53 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |