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

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

51°F

11°C

Humidity 31%
Wind Speed S 10 G 20 mph
Barometer 29.64 in (1003.8 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 24 Feb 4:53 pm CST
Extended Forecast for

2 Miles WSW Mascoutah IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 36. South wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 23 mph.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 52. Calm wind becoming north around 5 mph.

    High: 52 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 36. East wind 3 to 6 mph.

    Low: 36 °F

    Slight Chance
    Rain then
    Chance Rain

  • Thursday

    Thursday: A 30 percent chance of rain before noon. Partly sunny, with a high near 51. East wind around 6 mph becoming north in the afternoon.

    High: 51 °F

    Chance Rain
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34. Light and variable wind.

    Low: 34 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after midnight. Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

Tonight
Mostly cloudy, with a low around 36. South wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 23 mph.
Wednesday
Partly sunny, with a high near 52. Calm wind becoming north around 5 mph.
Wednesday Night
A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 36. East wind 3 to 6 mph.
Thursday
A 30 percent chance of rain before noon. Partly sunny, with a high near 51. East wind around 6 mph becoming north in the afternoon.
Thursday Night
Mostly clear, with a low around 34. Light and variable wind.
Friday
Sunny, with a high near 65.
Friday Night
Mostly clear, with a low around 41.
Saturday
Sunny, with a high near 67.
Saturday Night
A 20 percent chance of rain after midnight. Partly cloudy, with a low around 34.
Sunday
A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 47.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 34. Chance of precipitation is 40%.
Monday
A 30 percent chance of rain. Mostly cloudy, with a high near 51.
Monday Night
A 30 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 35.
Tuesday
A 50 percent chance of rain. Mostly cloudy, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Mascoutah IL
 38.5°N 89.84°W (Elev. 413 ft)
Last Update:
3:36 pm CST Feb 24, 2026
Forecast Valid:
5pm CST Feb 24, 2026-6pm CST Mar 3, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation