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

59°F

15°C

Humidity 56%
Wind Speed SE 6 mph
Barometer 29.93 in (1013.4 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 6 Nov 5:53 pm CST
Extended Forecast for

3 Miles E Mascoutah IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 53. Southeast wind 8 to 13 mph, with gusts as high as 22 mph.

    Low: 53 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy through mid morning, then gradual clearing, with a high near 71. West wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 71 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 43. West wind around 6 mph becoming calm after midnight.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of rain after noon. Partly sunny, with a high near 67. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 67 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 35. Southwest wind 10 to 16 mph becoming northwest after midnight. Winds could gust as high as 23 mph.

    Low: 35 °F

    Chance Rain
    then Mostly
    Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 42. Breezy.

    High: 42 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 42.

    High: 42 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 53. Southeast wind 8 to 13 mph, with gusts as high as 22 mph.
Friday
Mostly cloudy through mid morning, then gradual clearing, with a high near 71. West wind 8 to 13 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 43. West wind around 6 mph becoming calm after midnight.
Saturday
A 20 percent chance of rain after noon. Partly sunny, with a high near 67. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 35. Southwest wind 10 to 16 mph becoming northwest after midnight. Winds could gust as high as 23 mph.
Sunday
Mostly sunny, with a high near 42. Breezy.
Sunday Night
Partly cloudy, with a low around 25.
Monday
Sunny, with a high near 42.
Monday Night
Mostly clear, with a low around 25.
Veterans Day
Mostly sunny, with a high near 55.
Tuesday Night
Partly cloudy, with a low around 41.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 37.
Thursday
Sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Mascoutah IL
 38.52°N 89.75°W (Elev. 466 ft)
Last Update:
5:16 pm CST Nov 6, 2025
Forecast Valid:
6pm CST Nov 6, 2025-6pm CST Nov 13, 2025
 
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