Portland Michigan Climate Data

Monthly Average Climate Data for Portland Michigan

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.0 °F30.0 °F2.33 in.
February17.2 °F33.2 °F2.17 in.
March25.1 °F43.7 °F2.22 in.
April35.0 °F57.0 °F3.47 in.
May47.1 °F69.1 °F3.94 in.
June56.9 °F78.3 °F3.67 in.
July60.5 °F82.0 °F3.3 in.
August58.9 °F80.0 °F3.58 in.
September50.5 °F73.1 °F2.98 in.
October39.9 °F60.3 °F3.35 in.
November30.9 °F46.7 °F2.72 in.
December22.5 °F35.2 °F2.17 in.
Annual38.4 °F57.4 °F35.9 in.

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 : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2024 plantmaps.com