Lebanon, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.5 °F (low) to 55.8 °F (high). Annual precipitation averages 35.1 Inches. 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 | 10.2 °F | 26.4 °F | 1.48 in. |
| February | 12.6 °F | 30.0 °F | 1.44 in. |
| March | 23.4 °F | 42.1 °F | 1.89 in. |
| April | 35.0 °F | 55.6 °F | 3.61 in. |
| May | 46.5 °F | 67.8 °F | 3.9 in. |
| June | 56.5 °F | 77.6 °F | 5.01 in. |
| July | 60.6 °F | 81.3 °F | 4.09 in. |
| August | 58.5 °F | 79.4 °F | 3.9 in. |
| September | 50.4 °F | 73.0 °F | 3.21 in. |
| October | 39.1 °F | 59.5 °F | 2.88 in. |
| November | 27.9 °F | 44.9 °F | 2.03 in. |
| December | 17.1 °F | 32.0 °F | 1.66 in. |
| Annual | 36.5 °F | 55.8 °F | 35.1 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |