Ontonagon Michigan Climate Data

Monthly Average Climate Data for Ontonagon Michigan

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January10.3 °F24.6 °F2.19 in.
February9.2 °F27.2 °F1.53 in.
March17.2 °F36.9 °F1.38 in.
April28.6 °F49.2 °F2.45 in.
May39.8 °F63.1 °F3.03 in.
June49.0 °F72.1 °F3.24 in.
July55.1 °F77.0 °F3.36 in.
August55.2 °F76.3 °F2.69 in.
September48.5 °F69.0 °F2.88 in.
October37.5 °F55.5 °F3.23 in.
November27.1 °F40.8 °F2.6 in.
December16.3 °F29.6 °F2.75 in.
Annual32.8 °F51.8 °F31.33 in.

Climate Data for Ontonagon Michigan

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateJun. 1 - Jun. 10
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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