Wentzville, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Wentzville, a city in St. Charles County, Missouri.
Overnight
74°F
Mostly Clear
Mostly clear, with a low around 74. Southwest wind around 5 mph.
7-day forecast for Wentzville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 74°F | Mostly Clear | 5 mph SW | 4% |
| Saturday | 96°F | Partly Sunny | 3 to 8 mph SW | 4% |
| Saturday Night | 72°F | Partly Cloudy | 3 mph SW | 5% |
| Sunday | 90°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 1 to 6 mph NW | 44% |
| Sunday Night | 65°F | Showers And Thunderstorms Likely | 7 mph N | 74% |
| Monday | 75°F | Showers And Thunderstorms Likely | 5 to 9 mph NE | 74% |
| Monday Night | 58°F | Chance Rain Showers | 6 to 10 mph NE | 28% |
| Tuesday | 69°F | Slight Chance Rain Showers then Partly Sunny | 7 to 10 mph NE | 18% |
| Tuesday Night | 53°F | Mostly Cloudy | 3 to 9 mph N | 2% |
| Wednesday | 72°F | Mostly Sunny | 7 mph N | 1% |
| Wednesday Night | 54°F | Partly Cloudy | 1 to 6 mph N | 0% |
| Thursday | 75°F | Mostly Sunny | 2 to 6 mph NE | 3% |
| Thursday Night | 57°F | Mostly Cloudy | 1 to 5 mph NE | 5% |
| Friday | 76°F | Partly Sunny | 2 to 6 mph NE | 8% |
Forecast source: National Weather Service (api.weather.gov) for Wentzville (38.816, -90.871). Updated through the day.
Growing snapshot for Wentzville
Last spring frost
Apr 10
First fall frost
Oct 26
Growing season
199 days
Hardiness zone
6b
More local growing data for Wentzville: nearby ZIP 63385 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Augusta
Cottleville
Dardenne Prairie
Defiance
Flint Hill
Foristell
Josephville
Lake St. Louis
New Melle
O'Fallon
St. Paul
St. Peters
Weldon Spring
Weldon Spring Heights
West Alton
Climate data from the nearest NOAA station, Weldon Spring Nws, Mo (11.6 mi from Wentzville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.