South Milwaukee Wisconsin Climate Data

Monthly Average Climate Data for South Milwaukee Wisconsin

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.0 °F30.0 °F1.83 in.
February18.8 °F32.9 °F1.73 in.
March27.5 °F42.4 °F2.14 in.
April37.3 °F52.5 °F4.26 in.
May47.4 °F63.8 °F4.27 in.
June57.9 °F74.1 °F4.6 in.
July64.4 °F79.9 °F3.44 in.
August64.0 °F78.8 °F3.67 in.
September56.1 °F72.2 °F3.24 in.
October44.2 °F60.0 °F3.11 in.
November32.7 °F47.1 °F2.33 in.
December22.2 °F35.3 °F1.98 in.
Annual40.7 °F55.8 °F36.6 in.

Climate Data for South Milwaukee Wisconsin

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 11 - May 20
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year