Iron Mountain Michigan Climate Data

Monthly Average Climate Data for Iron Mountain Michigan

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January4.4 °F23.3 °F1.32 in.
February5.2 °F27.4 °F1.16 in.
March15.1 °F38.4 °F1.59 in.
April28.0 °F51.3 °F2.67 in.
May40.5 °F65.7 °F2.96 in.
June50.6 °F74.9 °F3.41 in.
July54.9 °F79.4 °F3.25 in.
August53.0 °F77.2 °F2.92 in.
September45.6 °F69.3 °F3.24 in.
October34.1 °F55.0 °F3.3 in.
November23.8 °F40.3 °F1.88 in.
December12.0 °F28.4 °F1.68 in.
Annual30.6 °F52.6 °F29.38 in.

Climate Data for Iron Mountain 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