Unionville Iowa Climate Data

Monthly Average Climate Data for Unionville Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.7 °F31.7 °F1.2 in.
February17.6 °F36.4 °F1.54 in.
March28.3 °F49.4 °F2.24 in.
April39.3 °F61.8 °F3.91 in.
May51.0 °F71.5 °F5.37 in.
June60.9 °F81.0 °F5.36 in.
July64.8 °F85.0 °F4.44 in.
August62.5 °F83.6 °F4.16 in.
September53.7 °F76.6 °F3.81 in.
October41.8 °F64.1 °F2.9 in.
November29.5 °F49.2 °F2.15 in.
December19.7 °F36.8 °F1.53 in.
Annual40.2 °F60.6 °F38.61 in.

Climate Data for Unionville Iowa

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2024 plantmaps.com