National Weather Service Forecast for: Wentzville MO
Issued by: National Weather Service Saint Louis, MO
Updated: 3:12 pm CDT Jul 16, 2026
 
This
Afternoon
This Afternoon: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. South wind around 5 mph.
Chance
T-storms

 Tonight

Tonight: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 73. Light southwest wind.
Chance
T-storms then
Partly Cloudy
 Friday

Friday: A slight chance of showers and thunderstorms between 9am and 2pm. Mostly sunny, with a high near 91. Heat index values as high as 101. West wind 3 to 8 mph. Chance of precipitation is 20%.
Slight Chance
T-storms

 Friday
Night
Friday Night: Mostly clear, with a low around 74. Southwest wind 5 to 7 mph.
Mostly Clear

 Saturday

Saturday: Sunny, with a high near 92. West wind 6 to 9 mph.
Sunny

 Saturday
Night
Saturday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 74.
Mostly Clear
then Slight
Chance
T-storms
 Sunday

Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 91.
Mostly Sunny
then Slight
Chance
T-storms
 Sunday
Night
Sunday Night: Mostly clear, with a low around 72.
Mostly Clear

 Monday

Monday: Sunny, with a high near 95.
Sunny
Hi 90 °F Lo 73 °F Hi 91 °F Lo 74 °F Hi 92 °F Lo 74 °F Hi 91 °F Lo 72 °F Hi 95 °F

 

This Afternoon
 
 A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. South wind around 5 mph.
Tonight
 
 A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 73. Light southwest wind.
Friday
 
 A slight chance of showers and thunderstorms between 9am and 2pm. Mostly sunny, with a high near 91. Heat index values as high as 101. West wind 3 to 8 mph. Chance of precipitation is 20%.
Friday Night
 
 Mostly clear, with a low around 74. Southwest wind 5 to 7 mph.
Saturday
 
 Sunny, with a high near 92. West wind 6 to 9 mph.
Saturday Night
 
 A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 74.
Sunday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 91.
Sunday Night
 
 Mostly clear, with a low around 72.
Monday
 
 Sunny, with a high near 95.
Monday Night
 
 Mostly clear, with a low around 76.
Tuesday
 
 Mostly sunny, with a high near 94.
Tuesday Night
 
 Partly cloudy, with a low around 69.
Wednesday
 
 Mostly sunny, with a high near 85.
Wednesday Night
 
 Partly cloudy, with a low around 64.
Thursday
 
 Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for Wentzville MO.