Dubuque Iowa Climate Data

Monthly Average Climate Data for Dubuque Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.3 °F27.8 °F1.29 in.
February14.3 °F32.2 °F1.49 in.
March26.2 °F45.1 °F2.08 in.
April37.8 °F58.8 °F3.83 in.
May49.2 °F70.9 °F4.5 in.
June59.8 °F80.5 °F5.68 in.
July63.6 °F83.7 °F4.97 in.
August61.5 °F81.8 °F3.93 in.
September53.1 °F75.0 °F3.7 in.
October41.2 °F61.6 °F2.86 in.
November29.2 °F46.0 °F2.25 in.
December17.9 °F33.3 °F1.71 in.
Annual38.8 °F58.1 °F38.29 in.

Climate Data for Dubuque 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 5a : -20°F to -15°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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