Ironton Wisconsin Climate Data

Monthly Average Climate Data for Ironton Wisconsin

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January8.3 °F25.9 °F1.52 in.
February11.1 °F30.3 °F1.35 in.
March22.2 °F42.5 °F2.07 in.
April33.8 °F56.1 °F4.02 in.
May45.8 °F68.2 °F4.55 in.
June56.0 °F77.7 °F5.49 in.
July59.9 °F81.7 °F4.42 in.
August57.6 °F79.6 °F4.48 in.
September49.2 °F72.3 °F3.57 in.
October37.3 °F59.2 °F2.83 in.
November26.2 °F44.2 °F2.06 in.
December15.4 °F31.4 °F1.7 in.
Annual35.2 °F55.8 °F38.06 in.

Climate Data for Ironton Wisconsin

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 4b : -25°F to -20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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