National Weather Service Forecast for: Wentzville MO
Issued by: National Weather Service Saint Louis, MO
Updated: 4:56 am CDT Jun 22, 2026
 
Today

Today: Mostly cloudy, with a high near 75. North wind 7 to 10 mph.
Mostly Cloudy

 Tonight

Tonight: Partly cloudy, with a low around 59. North wind around 6 mph becoming calm in the evening.
Partly Cloudy

 Tuesday

Tuesday: Sunny, with a high near 81. Light east wind.
Sunny

 Tuesday
Night
Tuesday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 63. Light southeast wind. Chance of precipitation is 30%.
Partly Cloudy
then Chance
Showers
 Wednesday

Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 83. Light south wind. Chance of precipitation is 60%.
Showers
Likely
 Wednesday
Night
Wednesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Slight Chance
T-storms
 Thursday

Thursday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83.
Mostly Sunny
then Chance
T-storms
 Thursday
Night
Thursday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Chance
T-storms
 Friday

Friday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
Chance
T-storms
Hi 75 °F Lo 59 °F Hi 81 °F Lo 63 °F Hi 83 °F Lo 64 °F Hi 83 °F Lo 63 °F Hi 82 °F

 

Today
 
 Mostly cloudy, with a high near 75. North wind 7 to 10 mph.
Tonight
 
 Partly cloudy, with a low around 59. North wind around 6 mph becoming calm in the evening.
Tuesday
 
 Sunny, with a high near 81. Light east wind.
Tuesday Night
 
 A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 63. Light southeast wind. Chance of precipitation is 30%.
Wednesday
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 83. Light south wind. Chance of precipitation is 60%.
Wednesday Night
 
 A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Thursday
 
 A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83.
Thursday Night
 
 A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Friday
 
 A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
Friday Night
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Saturday
 
 A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Saturday Night
 
 A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Sunday
 
 Mostly sunny, with a high near 93.

 

Forecast from NOAA-NWS for Wentzville MO.