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

64°F

18°C

Humidity 33%
Wind Speed S 12 mph
Barometer 30.12 in (1019.9 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 6 Nov 11:53 am CST
Extended Forecast for

3 Miles SE Mascoutah IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 66. Southeast wind 11 to 15 mph.

    High: 66 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 53. Southeast wind 9 to 14 mph becoming southwest after midnight. Winds could gust as high as 21 mph.

    Low: 53 °F

    Increasing
    Clouds

  • Friday

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

    High: 71 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 43. West wind around 6 mph becoming calm in the evening.

    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 8 to 13 mph in the morning.

    High: 67 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday

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

    High: 42 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 43.

    High: 43 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 66. Southeast wind 11 to 15 mph.
Tonight
Increasing clouds, with a low around 53. Southeast wind 9 to 14 mph becoming southwest after midnight. Winds could gust as high as 21 mph.
Friday
Mostly cloudy through mid morning, then gradual clearing, with a high near 71. West wind 8 to 13 mph.
Friday Night
Mostly clear, with a low around 43. West wind around 6 mph becoming calm in the evening.
Saturday
A 20 percent chance of rain after noon. Partly sunny, with a high near 67. Light and variable wind becoming southwest 8 to 13 mph in the morning.
Saturday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 42. Breezy.
Sunday Night
Mostly clear, with a low around 24.
Monday
Sunny, with a high near 43.
Monday Night
Mostly clear, with a low around 26.
Veterans Day
Mostly sunny, with a high near 58.
Tuesday Night
Partly cloudy, with a low around 40.
Wednesday
Sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Mascoutah IL
 38.49°N 89.76°W (Elev. 427 ft)
Last Update:
11:36 am CST Nov 6, 2025
Forecast Valid:
12pm CST Nov 6, 2025-6pm CST Nov 12, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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