Sturgeon Bay, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.6 °F (low) to 52.7 °F (high). Annual precipitation averages 32.4 Inches. 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 | 10.4 °F | 25.6 °F | 1.69 in. |
| February | 11.6 °F | 28.4 °F | 1.23 in. |
| March | 21.1 °F | 38.2 °F | 1.82 in. |
| April | 32.2 °F | 49.9 °F | 3.06 in. |
| May | 43.7 °F | 62.8 °F | 3.37 in. |
| June | 53.9 °F | 72.8 °F | 3.97 in. |
| July | 58.8 °F | 78.1 °F | 3.55 in. |
| August | 58.0 °F | 77.0 °F | 3.32 in. |
| September | 50.7 °F | 69.5 °F | 3.1 in. |
| October | 39.4 °F | 56.1 °F | 3.21 in. |
| November | 28.8 °F | 43.0 °F | 2.16 in. |
| December | 18.0 °F | 31.2 °F | 1.93 in. |
| Annual | 35.6 °F | 52.7 °F | 32.41 in. |
| 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 : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |