Whitefish Bay, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.7 °C (low) to 13.7 °C (high). Annual precipitation averages 886 Millimeters. 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 | -8.7 °C | -0.9 °C | 41.66 mm |
| February | -7.3 °C | 0.8 °C | 38.1 mm |
| March | -2.6 °C | 6 °C | 49.02 mm |
| April | 2.8 °C | 12.2 °C | 99.31 mm |
| May | 8.3 °C | 18.8 °C | 99.82 mm |
| June | 14.1 °C | 24.3 °C | 119.13 mm |
| July | 17.6 °C | 27.2 °C | 91.95 mm |
| August | 17.5 °C | 26.6 °C | 89.66 mm |
| September | 13.3 °C | 22.7 °C | 83.06 mm |
| October | 6.8 °C | 15.8 °C | 72.14 mm |
| November | 0.4 °C | 8.4 °C | 53.59 mm |
| December | -5.3 °C | 1.9 °C | 48.51 mm |
| Annual | 4.7 °C | 13.7 °C | 885.95 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |