Alpena Michigan Climate Data

Monthly Average Climate Data for Alpena Michigan

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.2 °F27.6 °F1.91 in.
February13.4 °F29.1 °F1.45 in.
March20.9 °F36.7 °F1.75 in.
April32.3 °F48.2 °F3.06 in.
May43.0 °F61.0 °F3.0 in.
June53.1 °F71.2 °F3.01 in.
July59.2 °F76.9 °F3.05 in.
August57.9 °F75.7 °F3.21 in.
September51.1 °F68.6 °F2.91 in.
October40.4 °F55.9 °F3.4 in.
November30.8 °F43.6 °F1.98 in.
December21.6 °F33.5 °F2.16 in.
Annual36.5 °F52.3 °F30.89 in.

Climate Data for Alpena Michigan

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 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