Iron River Michigan Climate Data

Monthly Average Climate Data for Iron River Michigan

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January2.6 °F21.7 °F1.18 in.
February2.7 °F26.1 °F1.01 in.
March12.1 °F37.4 °F1.44 in.
April25.8 °F49.8 °F2.61 in.
May38.8 °F64.3 °F3.2 in.
June48.6 °F73.4 °F3.96 in.
July52.7 °F77.3 °F4.07 in.
August50.6 °F75.4 °F3.13 in.
September43.4 °F67.4 °F3.57 in.
October32.5 °F53.3 °F3.3 in.
November22.0 °F38.2 °F1.83 in.
December10.0 °F26.5 °F1.49 in.
Annual28.5 °F50.9 °F30.79 in.

Climate Data for Iron River Michigan

Average First Frost DateSep.1 - Sep. 10
Average Last Frost DateJun. 11 - Jun. 20
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 4a : -30°F to -25°F
Plant Hardiness Zone - 2012Zone 4a : -30°F to -25°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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