Hillsboro Iowa Climate Data

Monthly Average Climate Data for Hillsboro Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.7 °F32.4 °F1.46 in.
February19.3 °F37.0 °F1.77 in.
March29.7 °F49.8 °F2.41 in.
April40.7 °F63.0 °F3.73 in.
May52.4 °F73.2 °F5.24 in.
June62.1 °F82.4 °F4.97 in.
July65.8 °F86.0 °F4.15 in.
August63.6 °F84.5 °F3.71 in.
September54.9 °F77.9 °F3.63 in.
October43.3 °F65.0 °F2.97 in.
November31.7 °F50.0 °F2.28 in.
December21.6 °F37.5 °F1.76 in.
Annual41.7 °F61.6 °F38.08 in.

Climate Data for Hillsboro Iowa

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost100-125 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
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