Williamstown, MO Weather & Growing Conditions
Overnight
51°F
Slight Chance Drizzle
A slight chance of drizzle. Mostly cloudy, with a low around 51. West wind around 12 mph, with gusts as high as 21 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Slight Chance Drizzle | 12 mph W | 12% |
| Wednesday | 56°F | Slight Chance Drizzle then Mostly Cloudy | 10 to 14 mph W | 12% |
| Wednesday Night | 44°F | Mostly Cloudy | 9 mph W | 2% |
| Thursday | 56°F | Mostly Cloudy | 10 mph W | 7% |
| Thursday Night | 44°F | Chance Light Rain then Mostly Cloudy | 8 mph NW | 26% |
| Friday | 52°F | Partly Sunny | 6 to 9 mph N | 1% |
| Friday Night | 33°F | Partly Cloudy | 5 mph N | 0% |
| Saturday | 53°F | Mostly Sunny | 5 mph NW | 0% |
| Saturday Night | 35°F | Mostly Clear | 3 mph W | 1% |
| Sunday | 60°F | Sunny | 6 mph W | 1% |
| Sunday Night | 36°F | Clear | 3 mph W | 0% |
| Monday | 65°F | Sunny | 3 to 8 mph SW | 0% |
| Monday Night | 42°F | Clear | 5 mph W | 0% |
| Tuesday | 66°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Williamstown, MO
Last spring frost
Apr 11
First fall frost
Oct 23
Growing season
194 days
Hardiness zone
6a
Explore more for Williamstown, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Canton L&D 20, Mo (15.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.