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.

Light Snow and Breezy

27°F

-3°C

Humidity 58%
Wind Speed NW 25 G 33 mph
Barometer 29.99 in (1016.0 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill12°F (-11°C)
Last update 16 Mar 12:53 pm CDT
Extended Forecast for

3 Miles WSW Mascoutah IL

  • This Afternoon

    This Afternoon: A chance of flurries. Mostly cloudy, with a high near 30. Breezy, with a northwest wind around 22 mph, with gusts as high as 36 mph.

    High: 30 °F

    Chance
    Flurries and
    Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 16. Northwest wind 13 to 18 mph, with gusts as high as 28 mph.

    Low: 16 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 35. Northwest wind 6 to 10 mph becoming southwest in the afternoon.

    High: 35 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow. Mostly cloudy, with a low around 31. Southeast wind 6 to 14 mph, with gusts as high as 24 mph.

    Low: 31 °F

    Chance Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 63. South wind 9 to 13 mph becoming west in the afternoon. Winds could gust as high as 22 mph.

    High: 63 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of flurries. Mostly cloudy, with a high near 30. Breezy, with a northwest wind around 22 mph, with gusts as high as 36 mph.
Tonight
Mostly cloudy, with a low around 16. Northwest wind 13 to 18 mph, with gusts as high as 28 mph.
Tuesday
Increasing clouds, with a high near 35. Northwest wind 6 to 10 mph becoming southwest in the afternoon.
Tuesday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 31. Southeast wind 6 to 14 mph, with gusts as high as 24 mph.
Wednesday
Mostly sunny, with a high near 63. South wind 9 to 13 mph becoming west in the afternoon. Winds could gust as high as 22 mph.
Wednesday Night
Partly cloudy, with a low around 42.
Thursday
Sunny, with a high near 72.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Mostly sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 50.
Sunday
Sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Mascoutah IL
 38.5°N 89.87°W (Elev. 449 ft)
Last Update:
12:11 pm CDT Mar 16, 2026
Forecast Valid:
1pm CDT Mar 16, 2026-6pm CDT Mar 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation