Washington Missouri Climate Data

Monthly Average Climate Data for Washington Missouri

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-5.8 °C4.4 °C63.75 mm
February-3.9 °C7.6 °C61.47 mm
March0.9 °C13.3 °C92.46 mm
April6.7 °C19.9 °C119.38 mm
May12.6 °C24.5 °C136.4 mm
June17.5 °C29.1 °C113.54 mm
July19.8 °C31.3 °C103.89 mm
August18.5 °C30.7 °C98.3 mm
September13.9 °C27.1 °C94.74 mm
October7.1 °C20.7 °C85.85 mm
November1.3 °C13.2 °C88.65 mm
December-3.4 °C6.9 °C69.09 mm
Annual7.1 °C19.1 °C1127.52 mm

Climate Data for Washington Missouri

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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