Brooklyn Iowa Climate Data

Monthly Average Climate Data for Brooklyn Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.6 °F27.9 °F1.1 in.
February14.9 °F32.7 °F1.38 in.
March26.1 °F45.8 °F2.13 in.
April37.2 °F59.5 °F3.6 in.
May50.0 °F71.2 °F4.74 in.
June61.0 °F81.2 °F5.5 in.
July64.1 °F84.5 °F4.36 in.
August61.2 °F82.7 °F4.36 in.
September52.2 °F75.6 °F3.59 in.
October40.2 °F62.2 °F2.91 in.
November28.1 °F46.7 °F2.1 in.
December17.7 °F33.6 °F1.53 in.
Annual38.7 °F58.6 °F37.3 in.

Climate Data for Brooklyn Iowa

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
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 ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation