Middletown Iowa Climate Data

Monthly Average Climate Data for Middletown Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.8 °F32.2 °F1.67 in.
February19.6 °F37.0 °F1.86 in.
March29.8 °F49.6 °F2.61 in.
April40.9 °F62.4 °F3.86 in.
May52.8 °F72.9 °F5.18 in.
June62.3 °F82.2 °F4.79 in.
July65.9 °F85.5 °F4.21 in.
August63.8 °F83.9 °F3.8 in.
September55.4 °F77.8 °F3.67 in.
October43.6 °F65.1 °F3.03 in.
November31.8 °F49.9 °F2.55 in.
December21.8 °F37.5 °F1.94 in.
Annual42 °F61.3 °F39.17 in.

Climate Data for Middletown 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 6a : -10°F to -5°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
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