National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat and Possible Flooding This Week

Hot temperatures and high humidity are forecast to continue across much of east Texas into the mid-Mississippi Valley through this week. Heavy to excessive rainfall occurring at times through Friday could bring areas of flooding across parts of the central Plains into the upper Midwest and Four Corners states. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

80°F

27°C

Humidity 60%
Wind Speed SE 8 mph
Barometer 29.99 in (1014.6 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 14 Sep 9:54 pm CDT
Extended Forecast for

Valley Park MO

Heat Advisory September 15, 11:00am until September 15, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 73. Southeast wind 6 to 8 mph.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers before 3pm, then a chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 100. Heat index values as high as 110. Southeast wind 5 to 7 mph becoming west in the afternoon. Chance of precipitation is 30%.

    High: 100 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 74. Light east wind. Chance of precipitation is 60%.

    Low: 74 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 95. Heat index values as high as 103. Light and variable wind.

    High: 95 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 75. Calm wind.

    Low: 75 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 73. Southeast wind 6 to 8 mph.
Tuesday
A slight chance of showers before 3pm, then a chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 100. Heat index values as high as 110. Southeast wind 5 to 7 mph becoming west in the afternoon. Chance of precipitation is 30%.
Tuesday Night
A slight chance of showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 74. Light east wind. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 95. Heat index values as high as 103. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 75. Calm wind.
Thursday
Sunny and hot, with a high near 97.
Thursday Night
Partly cloudy, with a low around 74.
Friday
Sunny, with a high near 96.
Friday Night
Partly cloudy, with a low around 73.
Saturday
Sunny, with a high near 96.
Saturday Night
Partly cloudy, with a low around 72.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Monday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Valley Park MO
 38.56°N 90.46°W (Elev. 492 ft)
Last Update:
10:16 pm CDT Sep 14, 2026
Forecast Valid:
10pm CDT Sep 14, 2026-6pm CDT Sep 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation