Ironwood Michigan Climate Data

Monthly Average Climate Data for Ironwood Michigan

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January2.7 °F20.3 °F2.0 in.
February3.7 °F25.0 °F1.42 in.
March13.7 °F36.3 °F1.84 in.
April27.4 °F48.7 °F2.95 in.
May40.5 °F63.2 °F3.65 in.
June50.6 °F72.7 °F3.9 in.
July55.3 °F76.7 °F4.14 in.
August53.0 °F74.9 °F3.72 in.
September45.8 °F67.1 °F3.76 in.
October33.9 °F52.7 °F3.82 in.
November22.6 °F37.7 °F2.69 in.
December10.6 °F25.8 °F2.33 in.
Annual30 °F50.1 °F36.22 in.

Climate Data for Ironwood Michigan

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateJun. 11 - Jun. 20
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 4b : -25°F to -20°F
Plant Hardiness Zone - 2012Zone 4a : -30°F to -25°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year