Williamstown, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williamstown, a community in Jefferson County, Kansas.
Overnight
73°F
Mostly Clear
Mostly clear, with a low around 73. South wind around 5 mph.
7-day forecast for Williamstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 73°F | Mostly Clear | 5 mph S | 5% |
| Saturday | 95°F | Mostly Sunny | 5 to 10 mph S | 11% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph NW | 83% |
| Sunday | 79°F | Chance Showers And Thunderstorms | 5 to 10 mph N | 41% |
| Sunday Night | 62°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 58% |
| Monday | 70°F | Rain Showers Likely | 5 to 10 mph N | 58% |
| Monday Night | 54°F | Mostly Cloudy | 5 to 10 mph NE | 4% |
| Tuesday | 68°F | Partly Sunny | 5 mph NE | 2% |
| Tuesday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Wednesday | 70°F | Mostly Sunny | 0 to 5 mph E | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 0 to 5 mph E | 9% |
| Thursday | 73°F | Chance Rain Showers | 0 to 5 mph E | 29% |
| Thursday Night | 58°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph E | 24% |
| Friday | 74°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 27% |
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 Sep 19, 2026.