Marion Iowa Climate Data

Monthly Average Climate Data for Marion Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.5 °F28.3 °F1.18 in.
February15.3 °F32.8 °F1.38 in.
March26.4 °F46.1 °F2.14 in.
April37.5 °F60.9 °F3.89 in.
May49.3 °F71.6 °F4.78 in.
June59.6 °F80.8 °F5.65 in.
July63.0 °F83.8 °F4.57 in.
August60.5 °F82.1 °F4.44 in.
September51.9 °F76.0 °F3.96 in.
October40.0 °F63.0 °F2.97 in.
November28.2 °F47.0 °F2.26 in.
December17.7 °F33.8 °F1.69 in.
Annual38.4 °F58.9 °F38.91 in.

Climate Data for Marion Iowa

Average First Frost DateOct. 1 - Oct. 10
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 5a : -20°F to -15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation