Millerton Iowa Climate Data

Monthly Average Climate Data for Millerton Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.3 °F31.6 °F1.07 in.
February17.1 °F36.3 °F1.41 in.
March27.8 °F49.2 °F2.2 in.
April38.6 °F61.1 °F3.98 in.
May50.4 °F71.0 °F5.43 in.
June60.4 °F80.5 °F5.37 in.
July64.7 °F85.0 °F4.53 in.
August62.0 °F83.2 °F4.37 in.
September53.0 °F76.6 °F3.79 in.
October40.9 °F64.0 °F2.92 in.
November28.8 °F49.1 °F2.03 in.
December18.9 °F36.9 °F1.47 in.
Annual39.7 °F60.4 °F38.57 in.

Climate Data for Millerton Iowa

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation