Altoona Iowa Climate Data

Monthly Average Climate Data for Altoona Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.1 °F29.8 °F0.95 in.
February15.9 °F34.3 °F1.17 in.
March27.0 °F47.3 °F2.07 in.
April38.3 °F61.1 °F3.77 in.
May50.4 °F71.5 °F5.02 in.
June60.8 °F81.1 °F5.3 in.
July64.4 °F84.9 °F4.27 in.
August61.9 °F83.1 °F4.18 in.
September53.1 °F76.7 °F3.39 in.
October40.7 °F63.4 °F2.6 in.
November28.6 °F48.1 °F1.81 in.
December17.9 °F35.0 °F1.34 in.
Annual39.3 °F59.7 °F35.87 in.

Climate Data for Altoona Iowa

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
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
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