Williamstown Missouri Climate Data

Monthly Average Climate Data for Williamstown Missouri

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.3 °C1.1 °C39.12 mm
February-6.5 °C3.7 °C46.74 mm
March-0.7 °C10.7 °C61.72 mm
April5.2 °C17.6 °C98.3 mm
May11.6 °C23 °C136.14 mm
June16.9 °C28.2 °C123.95 mm
July19.1 °C30.3 °C111.51 mm
August17.7 °C29.4 °C97.28 mm
September13.1 °C25.8 °C93.73 mm
October6.6 °C18.8 °C82.8 mm
November0.2 °C10.7 °C62.99 mm
December-5.2 °C3.8 °C46.99 mm
Annual5.8 °C16.9 °C1001.27 mm

Climate Data for Williamstown Missouri

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsSevere Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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