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Weather Forecast for Saint Louis

Now
Current Weather Conditions
85° F

Wind: 11.74 mph
Humidity: 68%
Clouds: 53%
Pressure: 1015 hPa
Sunrise: 7:17 AM ET
Sunset: 8:51 PM ET
Tomorrow
Tomorrow's Weather Conditions
Slight Chance
T-storms


Chance
T-storms

Thu
Thu's Weather Conditions
Partly Sunny
then Slight
Chance
T-storms

Mostly Clear



Extended Forecast
 
National Weather Service Forecast for: Saint Louis MO
Issued by: National Weather Service Saint Louis, MO
Updated: 8:16 pm CDT Aug 18, 2025
 
Tonight

Tonight: A 30 percent chance of showers and thunderstorms, mainly after 5am.  Partly cloudy, with a low around 76. South wind 3 to 5 mph.
Low: 76 °F
Tuesday

Tuesday: A slight chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 95. Heat index values as high as 105. Calm wind becoming north 5 to 8 mph in the afternoon.  Chance of precipitation is 20%.
High: 95 °F
Tuesday
Night
Tuesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers.  Partly cloudy, with a low around 74. North wind 5 to 7 mph becoming calm  in the evening.  Chance of precipitation is 40%.
Low: 74 °F
Wednesday

Wednesday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 88. Light north wind increasing to 5 to 9 mph in the morning.
High: 88 °F
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 68. Northeast wind 5 to 8 mph.
Low: 68 °F
Thursday

Thursday: Mostly sunny, with a high near 87.
High: 87 °F
Thursday
Night
Thursday Night: Mostly clear, with a low around 69.
Low: 69 °F
Friday

Friday: Sunny, with a high near 89.
High: 89 °F
Friday
Night
Friday Night: Mostly clear, with a low around 70.
Low: 70 °F
Chance
T-storms

Slight Chance
T-storms

Chance
T-storms

Partly Sunny
then Slight
Chance
T-storms
Mostly Clear

Mostly Sunny

Mostly Clear

Sunny

Mostly Clear

Heat Advisory
Hazardous Weather Outlook


Tonight
 
A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 76. South wind 3 to 5 mph.
Tuesday
 
A slight chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95. Heat index values as high as 105. Calm wind becoming north 5 to 8 mph in the afternoon. Chance of precipitation is 20%.
Tuesday Night
 
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 74. North wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 40%.
Wednesday
 
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Light north wind increasing to 5 to 9 mph in the morning.
Wednesday Night
 
Mostly clear, with a low around 68. Northeast wind 5 to 8 mph.
Thursday
 
Mostly sunny, with a high near 87.
Thursday Night
 
Mostly clear, with a low around 69.
Friday
 
Sunny, with a high near 89.
Friday Night
 
Mostly clear, with a low around 70.
Saturday
 
Mostly sunny, with a high near 88.
Saturday Night
 
Mostly clear, with a low around 64.
Sunday
 
Sunny, with a high near 82.
Sunday Night
 
Partly cloudy, with a low around 60.
Monday
 
Mostly sunny, with a high near 79.

Forecast from NOAA-NWS for Saint Louis.





 


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