National Weather Service Forecast for: Mehlville MO
Issued by: National Weather Service Saint Louis, MO
Updated: 2:21 pm CDT Jul 25, 2025
 
This
Afternoon
This Afternoon: Isolated showers and thunderstorms. Mostly sunny and hot, with a high near 97. Heat index values as high as 110. Southeast wind 3 to 6 mph. Chance of precipitation is 20%.
Isolated
T-storms
 Tonight

Tonight: Isolated showers and thunderstorms before 10pm. Partly cloudy, with a low around 77. South wind 3 to 6 mph. Chance of precipitation is 20%.
Isolated
T-storms then
Partly Cloudy
 Saturday

Saturday: Isolated showers and thunderstorms after 3pm. Mostly sunny, with a high near 94. Heat index values as high as 106. South wind 3 to 8 mph. Chance of precipitation is 20%.
Mostly Sunny
then Isolated
T-storms
 Saturday
Night
Saturday Night: Isolated showers and thunderstorms before 10pm. Partly cloudy, with a low around 78. South wind 3 to 6 mph. Chance of precipitation is 20%.
Isolated
T-storms then
Partly Cloudy
 Sunday

Sunday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94. Southwest wind 3 to 5 mph.
Slight Chance
T-storms
 Sunday
Night
Sunday Night: Mostly clear, with a low around 78.
Mostly Clear

 Monday

Monday: Sunny and hot, with a high near 99.
Hot

 Monday
Night
Monday Night: Mostly clear, with a low around 79.
Mostly Clear

 Tuesday

Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 100.
Sunny then
Slight Chance
T-storms
Hi 97 °F Lo 77 °F Hi 94 °F Lo 78 °F Hi 94 °F Lo 78 °F Hi 99 °F Lo 79 °F Hi 100 °F

Extreme Heat Warning
Hazardous Weather Outlook
 

This Afternoon
 
 Isolated showers and thunderstorms. Mostly sunny and hot, with a high near 97. Heat index values as high as 110. Southeast wind 3 to 6 mph. Chance of precipitation is 20%.
Tonight
 
 Isolated showers and thunderstorms before 10pm. Partly cloudy, with a low around 77. South wind 3 to 6 mph. Chance of precipitation is 20%.
Saturday
 
 Isolated showers and thunderstorms after 3pm. Mostly sunny, with a high near 94. Heat index values as high as 106. South wind 3 to 8 mph. Chance of precipitation is 20%.
Saturday Night
 
 Isolated showers and thunderstorms before 10pm. Partly cloudy, with a low around 78. South wind 3 to 6 mph. Chance of precipitation is 20%.
Sunday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94. Southwest wind 3 to 5 mph.
Sunday Night
 
 Mostly clear, with a low around 78.
Monday
 
 Sunny and hot, with a high near 99.
Monday Night
 
 Mostly clear, with a low around 79.
Tuesday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 100.
Tuesday Night
 
 A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 77.
Wednesday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Wednesday Night
 
 A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Thursday
 
 A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.

 

Forecast from NOAA-NWS for Mehlville MO.