Decatur Michigan Climate Data

Monthly Average Climate Data for Decatur Michigan

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.2 °C-0.4 °C72.64 mm
February-7.4 °C1.2 °C54.61 mm
March-3.2 °C7.1 °C59.94 mm
April2.8 °C14.2 °C88.9 mm
May9.1 °C20.6 °C105.41 mm
June14.1 °C25.8 °C100.33 mm
July16.1 °C28.1 °C95.25 mm
August15.3 °C27.2 °C102.36 mm
September11.1 °C23.7 °C87.63 mm
October4.9 °C16.3 °C102.11 mm
November-0.1 °C8.7 °C75.69 mm
December-4.8 °C2.3 °C65.79 mm
Annual4.1 °C14.6 °C1010.66 mm

Climate Data for Decatur Michigan

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2025 plantmaps.com