Williamstown, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williamstown, a community in Jefferson County, Kansas.
Today
92°F
Mostly Sunny
Mostly sunny, with a high near 92. South wind around 5 mph.
7-day forecast for Williamstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 92°F | Mostly Sunny | 5 mph S | 5% |
| Tonight | 70°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph E | 18% |
| Wednesday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 45% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 71% |
| Thursday | 85°F | Showers And Thunderstorms Likely then Mostly Sunny | 0 to 5 mph NE | 71% |
| Thursday Night | 67°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 43% |
| Friday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 43% |
| Friday Night | 70°F | Mostly Clear | 0 to 5 mph S | 9% |
| Saturday | 92°F | Sunny | 0 to 10 mph S | 9% |
| Saturday Night | 74°F | Mostly Clear | 5 to 10 mph S | 1% |
| Sunday | 94°F | Sunny | 10 to 15 mph S | 1% |
| Sunday Night | 75°F | Mostly Clear | 10 mph S | 2% |
| Monday | 95°F | Sunny | 10 to 15 mph S | 2% |
| Monday Night | 76°F | Mostly Clear | 10 to 15 mph S | 2% |
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 Aug 4, 2026.