Sturgeon Bay, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2 °C (low) to 11.5 °C (high). Annual precipitation averages 823.2 Millimeters. Sturgeon Bay is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12 °C | -3.6 °C | 42.93 mm |
| February | -11.3 °C | -2 °C | 31.24 mm |
| March | -6.1 °C | 3.4 °C | 46.23 mm |
| April | 0.1 °C | 9.9 °C | 77.72 mm |
| May | 6.5 °C | 17.1 °C | 85.6 mm |
| June | 12.2 °C | 22.7 °C | 100.84 mm |
| July | 14.9 °C | 25.6 °C | 90.17 mm |
| August | 14.4 °C | 25 °C | 84.33 mm |
| September | 10.4 °C | 20.8 °C | 78.74 mm |
| October | 4.1 °C | 13.4 °C | 81.53 mm |
| November | -1.8 °C | 6.1 °C | 54.86 mm |
| December | -7.8 °C | -0.4 °C | 49.02 mm |
| Annual | 2 °C | 11.5 °C | 823.21 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°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 |