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

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

39°F

4°C

Humidity 43%
Wind Speed S 12 G 20 mph
Barometer 30.05 in (1017.8 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 11 Nov 9:53 am CST
Extended Forecast for

4 Miles SSE Mascoutah IL

  • Veterans Day

    Veterans Day: Cloudy, then gradually becoming mostly sunny, with a high near 54. South wind 9 to 17 mph, with gusts as high as 32 mph.

    High: 54 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Clear, with a low around 37. South wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 21 mph.

    Low: 37 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 63. West wind 6 to 9 mph.

    High: 63 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 36. Light west wind.

    Low: 36 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 63. Calm wind becoming south 5 to 8 mph in the morning.

    High: 63 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

Veterans Day
Cloudy, then gradually becoming mostly sunny, with a high near 54. South wind 9 to 17 mph, with gusts as high as 32 mph.
Tonight
Clear, with a low around 37. South wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 21 mph.
Wednesday
Sunny, with a high near 63. West wind 6 to 9 mph.
Wednesday Night
Mostly clear, with a low around 36. Light west wind.
Thursday
Partly sunny, with a high near 63. Calm wind becoming south 5 to 8 mph in the morning.
Thursday Night
Partly cloudy, with a low around 48.
Friday
Mostly sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
A 30 percent chance of rain, mainly after midnight. Partly cloudy, with a low around 55.
Sunday
A 40 percent chance of rain. Mostly sunny, with a high near 69.
Sunday Night
A 30 percent chance of rain. Partly cloudy, with a low around 45.
Monday
A 40 percent chance of rain. Partly sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Mascoutah IL
 38.47°N 89.78°W (Elev. 420 ft)
Last Update:
8:22 am CST Nov 11, 2025
Forecast Valid:
10am CST Nov 11, 2025-6pm CST Nov 17, 2025
 
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