Williamstown, KY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williamstown, a city in Grant County, Kentucky.
Overnight
66°F
Mostly Cloudy
Mostly cloudy, with a low around 66. East wind around 5 mph.
7-day forecast for Williamstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Mostly Cloudy | 5 mph E | 3% |
| Saturday | 89°F | Partly Sunny then Chance Showers And Thunderstorms | 5 mph S | 32% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 6 mph S | 58% |
| Sunday | 90°F | Slight Chance Rain Showers then Mostly Sunny | 7 mph SW | 21% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 7 mph N | 42% |
| Monday | 77°F | Chance Rain Showers | 8 mph NE | 43% |
| Monday Night | 57°F | Chance Showers And Thunderstorms | 7 to 10 mph NE | 51% |
| Tuesday | 72°F | Chance Showers And Thunderstorms | 7 mph NE | 41% |
| Tuesday Night | 58°F | Slight Chance Showers And Thunderstorms | 5 to 8 mph NE | 45% |
| Wednesday | 72°F | Chance Showers And Thunderstorms | 6 mph N | 45% |
| Wednesday Night | 56°F | Chance Showers And Thunderstorms | 6 mph N | 45% |
| Thursday | 71°F | Partly Sunny | 3 to 7 mph N | 12% |
| Thursday Night | 55°F | Mostly Cloudy | 6 mph N | 12% |
| Friday | 71°F | Mostly Sunny | 7 mph NE | 8% |
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.