Shorewood, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.7 °C (low) to 13.6 °C (high). Annual precipitation averages 896.6 Millimeters. Shorewood is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.8 °C | -0.8 °C | 41.91 mm |
| February | -7.4 °C | 0.8 °C | 37.34 mm |
| March | -2.6 °C | 6.1 °C | 49.53 mm |
| April | 2.7 °C | 12 °C | 99.31 mm |
| May | 8.3 °C | 18.6 °C | 101.09 mm |
| June | 14.1 °C | 24.1 °C | 121.16 mm |
| July | 17.6 °C | 27.1 °C | 95.25 mm |
| August | 17.5 °C | 26.5 °C | 91.19 mm |
| September | 13.1 °C | 22.6 °C | 84.84 mm |
| October | 6.8 °C | 15.8 °C | 72.39 mm |
| November | 0.3 °C | 8.5 °C | 54.1 mm |
| December | -5.4 °C | 2 °C | 48.51 mm |
| Annual | 4.7 °C | 13.6 °C | 896.62 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |