Ironwood Michigan Climate Data

Monthly Average Climate Data for Ironwood Michigan

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-16.3 °C-6.5 °C50.8 mm
February-15.7 °C-3.9 °C36.07 mm
March-10.2 °C2.4 °C46.74 mm
April-2.6 °C9.3 °C74.93 mm
May4.7 °C17.3 °C92.71 mm
June10.3 °C22.6 °C99.06 mm
July12.9 °C24.8 °C105.16 mm
August11.7 °C23.8 °C94.49 mm
September7.7 °C19.5 °C95.5 mm
October1.1 °C11.5 °C97.03 mm
November-5.2 °C3.2 °C68.33 mm
December-11.9 °C-3.4 °C59.18 mm
Annual-1.1 °C10.1 °C920 mm

Climate Data for Ironwood Michigan

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateJun. 11 - Jun. 20
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 4b : -31.7°C to -28.9°C
Plant Hardiness Zone - 2012Zone 4a : -34.4°C to -31.7°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year