Brighton Iowa Climate Data

Monthly Average Climate Data for Brighton Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.1 °F31.1 °F1.38 in.
February17.8 °F35.7 °F1.63 in.
March28.4 °F48.7 °F2.36 in.
April39.5 °F62.4 °F3.66 in.
May51.4 °F72.8 °F5.21 in.
June61.4 °F82.0 °F5.05 in.
July64.9 °F85.5 °F4.09 in.
August62.4 °F83.8 °F4.38 in.
September53.5 °F77.5 °F3.4 in.
October41.8 °F64.7 °F3.0 in.
November30.3 °F49.2 °F2.28 in.
December20.0 °F36.3 °F1.77 in.
Annual40.5 °F60.8 °F38.21 in.

Climate Data for Brighton 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 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation