Harman US

Williamstown, KY Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Williamstown, a city in Grant County, Kentucky.

Overnight
64°F
Patchy Fog
Patchy fog after 4am. Partly cloudy, with a low around 64. East wind around 5 mph.

7-day forecast for Williamstown

WhenTempForecastWindPrecip
Overnight 64°F Patchy Fog 5 mph E 3%
Saturday 86°F Areas Of Fog then Chance Showers And Thunderstorms 5 mph SE 31%
Saturday Night 68°F Chance Showers And Thunderstorms 5 mph S 40%
Sunday 87°F Mostly Sunny then Slight Chance Showers And Thunderstorms 7 mph SW 16%
Sunday Night 66°F Chance Showers And Thunderstorms 7 mph N 33%
Monday 81°F Chance Rain Showers then Chance Showers And Thunderstorms 7 mph NE 42%
Monday Night 61°F Chance Showers And Thunderstorms 9 mph NE 52%
Tuesday 74°F Chance Rain Showers 8 mph NE 43%
Tuesday Night 60°F Chance Showers And Thunderstorms 5 to 8 mph NE 43%
Wednesday 71°F Chance Rain Showers 7 mph N 43%
Wednesday Night 57°F Slight Chance Rain Showers then Mostly Cloudy 7 mph N 24%
Thursday 72°F Partly Sunny 7 mph N 12%
Thursday Night 57°F Mostly Cloudy 6 mph N 12%
Friday 71°F Partly Sunny 7 mph N 4%

Forecast source: National Weather Service (api.weather.gov) for Williamstown (38.640, -84.573). Updated through the day.

Growing snapshot for Williamstown

Last spring frost
Apr 11
First fall frost
Oct 29
Growing season
199 days
Hardiness zone
6b

More local growing data for Williamstown: nearby ZIP 41097 weather · frost dates · planting calendar · Kentucky frost dates

Nearby towns & communities

All Kentucky locations ›

Climate data from the nearest NOAA station, Williamstown, Ky (1.8 mi from Williamstown). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.