Iona Minnesota Climate Data

Monthly Average Climate Data for Iona Minnesota

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January6.2 °F23.0 °F0.77 in.
February10.1 °F27.4 °F0.92 in.
March21.3 °F39.4 °F1.54 in.
April33.4 °F54.5 °F3.07 in.
May46.3 °F67.5 °F3.88 in.
June57.7 °F77.8 °F4.65 in.
July61.2 °F81.6 °F3.56 in.
August58.5 °F78.9 °F3.46 in.
September49.9 °F72.2 °F3.5 in.
October36.6 °F58.1 °F2.32 in.
November23.6 °F41.5 °F1.32 in.
December12.2 °F27.7 °F1.11 in.
Annual34.8 °F54.1 °F30.1 in.

Climate Data for Iona Minnesota

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 4b : -25°F to -20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation