Brighton Iowa Climate Data

Monthly Average Climate Data for Brighton Iowa

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.9 °C-0.5 °C35.05 mm
February-7.9 °C2.1 °C41.4 mm
March-2 °C9.3 °C59.94 mm
April4.2 °C16.9 °C92.96 mm
May10.8 °C22.7 °C132.33 mm
June16.3 °C27.8 °C128.27 mm
July18.3 °C29.7 °C103.89 mm
August16.9 °C28.8 °C111.25 mm
September11.9 °C25.3 °C86.36 mm
October5.4 °C18.2 °C76.2 mm
November-0.9 °C9.6 °C57.91 mm
December-6.7 °C2.4 °C44.96 mm
Annual4.7 °C16 °C970.52 mm

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 : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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