Whitefish Bay, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.5 °F (low) to 56.6 °F (high). Annual precipitation averages 34.9 Inches. Whitefish Bay 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 | 16.3 °F | 30.4 °F | 1.64 in. |
| February | 18.9 °F | 33.5 °F | 1.5 in. |
| March | 27.4 °F | 42.8 °F | 1.93 in. |
| April | 37.0 °F | 53.9 °F | 3.91 in. |
| May | 47.0 °F | 65.8 °F | 3.93 in. |
| June | 57.3 °F | 75.7 °F | 4.69 in. |
| July | 63.6 °F | 81.0 °F | 3.62 in. |
| August | 63.5 °F | 79.8 °F | 3.53 in. |
| September | 55.9 °F | 72.9 °F | 3.27 in. |
| October | 44.3 °F | 60.5 °F | 2.84 in. |
| November | 32.7 °F | 47.2 °F | 2.11 in. |
| December | 22.5 °F | 35.5 °F | 1.91 in. |
| Annual | 40.5 °F | 56.6 °F | 34.88 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |