Williamstown Missouri Climate Data

Monthly Average Climate Data for Williamstown Missouri

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.0 °F34.0 °F1.54 in.
February20.3 °F38.7 °F1.84 in.
March30.8 °F51.3 °F2.43 in.
April41.3 °F63.7 °F3.87 in.
May52.8 °F73.4 °F5.36 in.
June62.5 °F82.8 °F4.88 in.
July66.3 °F86.6 °F4.39 in.
August63.9 °F85.0 °F3.83 in.
September55.5 °F78.4 °F3.69 in.
October43.9 °F65.9 °F3.26 in.
November32.4 °F51.2 °F2.48 in.
December22.6 °F38.8 °F1.85 in.
Annual42.4 °F62.5 °F39.42 in.

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 : -10°F to -5°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
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