Copper Harbor Michigan Climate Data

Monthly Average Climate Data for Copper Harbor Michigan

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.2 °F24.3 °F2.51 in.
February13.5 °F25.8 °F1.87 in.
March20.1 °F33.9 °F1.89 in.
April30.5 °F44.1 °F2.57 in.
May40.1 °F57.0 °F2.8 in.
June47.9 °F65.9 °F2.69 in.
July55.7 °F71.6 °F2.43 in.
August57.7 °F72.0 °F2.5 in.
September51.5 °F65.1 °F2.93 in.
October40.3 °F51.9 °F3.67 in.
November29.7 °F40.1 °F3.03 in.
December20.8 °F30.3 °F3.2 in.
Annual35.2 °F48.5 °F32.09 in.

Climate Data for Copper Harbor Michigan

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 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
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