West Milwaukee, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.6 °F (low) to 57.2 °F (high). Annual precipitation averages 35.8 Inches. West Milwaukee 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 | 14.8 °F | 29.8 °F | 1.77 in. |
| February | 17.7 °F | 33.3 °F | 1.72 in. |
| March | 26.6 °F | 43.5 °F | 2.02 in. |
| April | 36.9 °F | 55.0 °F | 4.0 in. |
| May | 47.6 °F | 66.9 °F | 3.99 in. |
| June | 57.8 °F | 76.9 °F | 4.78 in. |
| July | 63.3 °F | 81.9 °F | 3.56 in. |
| August | 62.2 °F | 80.8 °F | 3.73 in. |
| September | 54.1 °F | 74.0 °F | 3.22 in. |
| October | 42.5 °F | 61.6 °F | 2.81 in. |
| November | 31.2 °F | 47.2 °F | 2.16 in. |
| December | 21.0 °F | 35.1 °F | 2.06 in. |
| Annual | 39.6 °F | 57.2 °F | 35.82 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |