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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
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.