Lake Wisconsin, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.6 °C (low) to 13.9 °C (high). Annual precipitation averages 959.9 Millimeters. Lake Wisconsin 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 | -12.3 °C | -2.7 °C | 35.31 mm |
| February | -10.9 °C | -0.2 °C | 35.81 mm |
| March | -4.9 °C | 6.4 °C | 53.85 mm |
| April | 1.6 °C | 14.1 °C | 101.35 mm |
| May | 8.4 °C | 20.9 °C | 112.52 mm |
| June | 14.2 °C | 26.2 °C | 137.92 mm |
| July | 16.3 °C | 28.3 °C | 113.79 mm |
| August | 15.1 °C | 27.2 °C | 107.95 mm |
| September | 10.4 °C | 23.1 °C | 92.2 mm |
| October | 3.9 °C | 15.8 °C | 73.41 mm |
| November | -2.3 °C | 7.3 °C | 53.09 mm |
| December | -8.3 °C | 0.4 °C | 42.67 mm |
| Annual | 2.6 °C | 13.9 °C | 959.87 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |