Ballwin Missouri Climate Data

Monthly Average Climate Data for Ballwin Missouri

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.6 °C4.6 °C71.12 mm
February-2.8 °C7.6 °C62.74 mm
March2.1 °C13.3 °C92.2 mm
April8 °C19.8 °C120.9 mm
May13.9 °C24.7 °C135.64 mm
June18.9 °C29.4 °C117.6 mm
July21.1 °C31.4 °C102.62 mm
August20 °C30.8 °C89.66 mm
September15.5 °C27.1 °C84.07 mm
October8.8 °C20.6 °C84.84 mm
November2.8 °C12.9 °C92.2 mm
December-2 °C7 °C70.36 mm
Annual8.5 °C19.1 °C1123.95 mm

Climate Data for Ballwin Missouri

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7a : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCfa - Humid Subtropical Climate
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