Hillsboro Iowa Climate Data

Monthly Average Climate Data for Hillsboro Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.1 °C0.2 °C37.08 mm
February-7.1 °C2.8 °C44.96 mm
March-1.3 °C9.9 °C61.21 mm
April4.8 °C17.2 °C94.74 mm
May11.3 °C22.9 °C133.1 mm
June16.7 °C28 °C126.24 mm
July18.8 °C30 °C105.41 mm
August17.6 °C29.2 °C94.23 mm
September12.7 °C25.5 °C92.2 mm
October6.3 °C18.3 °C75.44 mm
November-0.2 °C10 °C57.91 mm
December-5.8 °C3.1 °C44.7 mm
Annual5.4 °C16.4 °C967.22 mm

Climate Data for Hillsboro Iowa

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 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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