Kennan, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.9 °C (low) to 10.7 °C (high). Annual precipitation averages 831.9 Millimeters. Kennan is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.8 °C | -6.2 °C | 27.69 mm |
| February | -15.7 °C | -3.4 °C | 25.4 mm |
| March | -9.2 °C | 3.2 °C | 40.13 mm |
| April | -1.6 °C | 10.8 °C | 72.39 mm |
| May | 5.3 °C | 18.3 °C | 95.5 mm |
| June | 10.9 °C | 23.3 °C | 117.35 mm |
| July | 13.2 °C | 25.6 °C | 98.3 mm |
| August | 11.9 °C | 24.4 °C | 99.06 mm |
| September | 7.7 °C | 20.1 °C | 93.22 mm |
| October | 1.2 °C | 12.3 °C | 80.77 mm |
| November | -5.3 °C | 3.6 °C | 47.24 mm |
| December | -12.3 °C | -3.3 °C | 34.8 mm |
| Annual | -0.9 °C | 10.7 °C | 831.85 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |