Williamstown, KY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williamstown, a city in Grant County, Kentucky.
This Afternoon
85°F
Sunny
Sunny, with a high near 85. Northeast wind around 5 mph.
7-day forecast for Williamstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Sunny | 5 mph NE | 0% |
| Tonight | 66°F | Partly Cloudy | 3 mph NE | 2% |
| Wednesday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 mph N | 31% |
| Wednesday Night | 68°F | Partly Cloudy | 3 mph S | 14% |
| Thursday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph SW | 24% |
| Thursday Night | 69°F | Slight Chance Showers And Thunderstorms | 5 mph S | 52% |
| Friday | 85°F | Showers And Thunderstorms Likely | 7 mph SW | 68% |
| Friday Night | 67°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph SW | 68% |
| Saturday | 85°F | Chance Showers And Thunderstorms | 3 to 7 mph SW | 33% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 33% |
| Sunday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph SW | 17% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 6 mph SW | 17% |
| Monday | 88°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 8 mph SW | 18% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 mph SW | 25% |
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
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 Aug 4, 2026.