Wentzville, MO Weather & Growing Conditions
Tonight
73°F
Partly Cloudy
Partly cloudy, with a low around 73. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 73°F | Partly Cloudy | 5 mph S | 8% |
| Saturday | 97°F | Partly Sunny | 3 to 7 mph SW | 5% |
| Saturday Night | 72°F | Partly Cloudy | 3 mph SW | 6% |
| Sunday | 91°F | Chance Rain Showers then Chance Showers And Thunderstorms | 5 mph W | 32% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 mph N | 67% |
| Monday | 77°F | Showers And Thunderstorms Likely | 5 to 9 mph N | 69% |
| Monday Night | 59°F | Showers And Thunderstorms Likely | 6 to 9 mph N | 61% |
| Tuesday | 70°F | Slight Chance Rain Showers then Mostly Cloudy | 9 mph N | 23% |
| Tuesday Night | 53°F | Mostly Cloudy | 3 to 8 mph N | 6% |
| Wednesday | 73°F | Mostly Sunny | 6 mph N | 0% |
| Wednesday Night | 54°F | Partly Cloudy | 1 to 5 mph N | 1% |
| Thursday | 75°F | Mostly Sunny | 2 to 6 mph N | 3% |
| Thursday Night | 57°F | Partly Cloudy | 1 to 5 mph NE | 3% |
| Friday | 75°F | Mostly Sunny | 2 to 6 mph NE | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Wentzville, MO
Last spring frost
Apr 10
First fall frost
Oct 26
Growing season
199 days
Hardiness zone
6b
Explore more for Wentzville, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Weldon Spring Nws, Mo (11.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.