Shawano, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.2 °C (low) to 12.7 °C (high). Annual precipitation averages 840.8 Millimeters. Shawano is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.4 °C | -3.9 °C | 33.02 mm |
| February | -12.6 °C | -1.7 °C | 27.69 mm |
| March | -6.6 °C | 4.8 °C | 45.47 mm |
| April | 0.3 °C | 12.6 °C | 77.47 mm |
| May | 7 °C | 19.8 °C | 95.25 mm |
| June | 12.6 °C | 25.1 °C | 111.76 mm |
| July | 14.8 °C | 27.4 °C | 98.55 mm |
| August | 13.7 °C | 26.4 °C | 92.71 mm |
| September | 9.2 °C | 22.2 °C | 91.95 mm |
| October | 2.7 °C | 14.4 °C | 76.2 mm |
| November | -3.2 °C | 6.2 °C | 50.04 mm |
| December | -9.6 °C | -1.1 °C | 40.64 mm |
| Annual | 1.2 °C | 12.7 °C | 840.75 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |