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Williamstown, KS Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Williamstown, a community in Jefferson County, Kansas.

This Afternoon
95°F
Sunny
Sunny, with a high near 95. South wind around 10 mph, with gusts as high as 20 mph.

7-day forecast for Williamstown

WhenTempForecastWindPrecip
This Afternoon 95°F Sunny 10 mph S 5%
Tonight 66°F Chance Showers And Thunderstorms 0 to 5 mph W 68%
Sunday 80°F Chance Showers And Thunderstorms 0 to 5 mph N 40%
Sunday Night 62°F Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 5 mph N 58%
Monday 70°F Rain Showers Likely 5 to 10 mph N 58%
Monday Night 54°F Mostly Cloudy 5 to 10 mph NE 4%
Tuesday 68°F Partly Sunny 5 mph NE 2%
Tuesday Night 50°F Partly Cloudy 0 to 5 mph NE 2%
Wednesday 70°F Mostly Sunny 0 to 5 mph E 1%
Wednesday Night 53°F Partly Cloudy 0 to 5 mph E 9%
Thursday 73°F Chance Rain Showers 0 to 5 mph E 29%
Thursday Night 58°F Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms 0 to 5 mph E 24%
Friday 74°F Chance Showers And Thunderstorms 0 to 5 mph E 27%
Friday Night 59°F Mostly Cloudy then Slight Chance Showers And Thunderstorms 0 to 5 mph E 16%

Forecast source: National Weather Service (api.weather.gov) for Williamstown (39.064, -95.332). Updated through the day.

Growing snapshot for Williamstown

Last spring frost
Apr 13
First fall frost
Oct 24
Growing season
191 days
Hardiness zone
6b

More local growing data for Williamstown: nearby ZIP 66073 weather · frost dates · planting calendar · Kansas frost dates

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Climate data from the nearest NOAA station, Perry Lake, Ks (2.3 mi from Williamstown). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.