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

16°F

-9°C

Humidity 67%
Wind Speed Calm
Barometer 30.26 in (1025.3 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Last update 4 Dec 8:53 pm CST
Extended Forecast for

Dupo IL

  • Tonight

    Tonight: Clear, with a low around 11. Light and variable wind.

    Low: 11 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 40. South wind 3 to 7 mph.

    High: 40 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 28. South wind 5 to 7 mph becoming light and variable after midnight.

    Low: 28 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 38. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 38 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 29. East wind 3 to 5 mph.

    Low: 29 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Sunday

    Sunday: A slight chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 20%.

    High: 38 °F

    Slight Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 17.

    Low: 17 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 11. Light and variable wind.
Friday
Sunny, with a high near 40. South wind 3 to 7 mph.
Friday Night
Increasing clouds, with a low around 28. South wind 5 to 7 mph becoming light and variable after midnight.
Saturday
Partly sunny, with a high near 38. Calm wind becoming northeast around 5 mph in the afternoon.
Saturday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 29. East wind 3 to 5 mph.
Sunday
A slight chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 17.
Monday
Mostly sunny, with a high near 33.
Monday Night
Partly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 47.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 48.
Wednesday Night
Mostly cloudy, with a low around 24.
Thursday
Partly sunny, with a high near 36.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dupo IL
 38.51°N 90.21°W (Elev. 397 ft)
Last Update:
8:26 pm CST Dec 4, 2025
Forecast Valid:
10pm CST Dec 4, 2025-6pm CST Dec 11, 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