Williamstown, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williamstown, a community in Jefferson County, Kansas.
Tonight
44°F
Cloudy
Cloudy, with a low around 44. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
7-day forecast for Williamstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 44°F | Cloudy | 10 to 15 mph NW | 13% |
| Wednesday | 58°F | Partly Sunny | 5 to 10 mph W | 1% |
| Wednesday Night | 39°F | Mostly Clear | 0 to 5 mph W | 5% |
| Thursday | 57°F | Mostly Sunny then Slight Chance Rain Showers | 5 to 10 mph NW | 18% |
| Thursday Night | 39°F | Partly Cloudy | 0 to 5 mph NW | 1% |
| Friday | 57°F | Mostly Sunny | 0 to 5 mph N | 0% |
| Friday Night | 36°F | Mostly Cloudy | 0 mph | 0% |
| Saturday | 60°F | Partly Sunny | 0 to 5 mph W | 3% |
| Saturday Night | 37°F | Mostly Clear | 0 mph | 5% |
| Sunday | 65°F | Sunny | 0 to 5 mph W | 4% |
| Sunday Night | 40°F | Mostly Clear | 0 mph | 0% |
| Monday | 69°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 42°F | Mostly Clear | 0 to 5 mph W | 0% |
| Tuesday | 69°F | Mostly Sunny | 0 to 5 mph E | 0% |
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
Nearby towns & communities
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 Nov 4, 2026.