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Areas of Severe Thunderstorms and Heat

Scattered severe thunderstorms and excessive rainfall are possible today in the Mid Atlantic, posing a risk for damaging winds and isolated flash flooding. Extreme Heat Warnings are in effect today for northeast Texas into southern Oklahoma and Arkansas. Extreme Heat Warnings are also in effect for the Desert Southwest today into Sunday. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

A Few Clouds

80°F

27°C

Humidity 71%
Wind Speed Vrbl 5 mph
Barometer 30.02 in (1016.2 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 20 Aug 11:53 am CDT
Extended Forecast for

4 Miles WNW Millstadt IL

  • This Afternoon

    This Afternoon: A slight chance of showers between 1pm and 3pm. Partly sunny, with a high near 83. North wind around 7 mph. Chance of precipitation is 20%.

    High: 83 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 64. Northeast wind around 6 mph becoming calm in the evening.

    Low: 64 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, sunny, with a high near 86. Light and variable wind.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 68. Light and variable wind.

    Low: 68 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly sunny, with a high near 84. Northwest wind 5 to 8 mph. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
A slight chance of showers between 1pm and 3pm. Partly sunny, with a high near 83. North wind around 7 mph. Chance of precipitation is 20%.
Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 64. Northeast wind around 6 mph becoming calm in the evening.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 86. Light and variable wind.
Friday Night
Mostly clear, with a low around 68. Light and variable wind.
Saturday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly sunny, with a high near 84. Northwest wind 5 to 8 mph. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 63.
Monday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. Chance of precipitation is 20%.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Tuesday
Mostly sunny, with a high near 86.
Tuesday Night
Partly cloudy, with a low around 68.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Millstadt IL
 38.48°N 90.15°W (Elev. 548 ft)
Last Update:
11:16 am CDT Aug 20, 2026
Forecast Valid:
12pm CDT Aug 20, 2026-6pm CDT Aug 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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