Portland Michigan Climate Data

Monthly Average Climate Data for Portland Michigan

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.9 °C-1.1 °C59.18 mm
February-8.2 °C0.7 °C55.12 mm
March-3.8 °C6.5 °C56.39 mm
April1.7 °C13.9 °C88.14 mm
May8.4 °C20.6 °C100.08 mm
June13.8 °C25.7 °C93.22 mm
July15.8 °C27.8 °C83.82 mm
August14.9 °C26.7 °C90.93 mm
September10.3 °C22.8 °C75.69 mm
October4.4 °C15.7 °C85.09 mm
November-0.6 °C8.2 °C69.09 mm
December-5.3 °C1.8 °C55.12 mm
Annual3.5 °C14.1 °C911.87 mm

Climate Data for Portland Michigan

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6a : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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