Castana Iowa Climate Data

Monthly Average Climate Data for Castana Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January10.6 °F29.9 °F0.68 in.
February14.7 °F35.0 °F0.84 in.
March25.8 °F48.2 °F1.61 in.
April36.6 °F61.7 °F3.54 in.
May49.0 °F72.5 °F4.57 in.
June59.8 °F82.4 °F4.73 in.
July63.5 °F85.7 °F3.97 in.
August60.7 °F83.4 °F4.2 in.
September51.5 °F77.4 °F3.03 in.
October38.7 °F64.5 °F2.28 in.
November25.8 °F48.2 °F1.37 in.
December15.6 °F34.5 °F1.09 in.
Annual37.7 °F60.3 °F31.91 in.

Climate Data for Castana Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 1 - May 10
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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