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

43°F

6°C

Humidity 37%
Wind Speed S 8 mph
Barometer 29.92 in (1013.6 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 5 Dec 2:53 pm CST
Extended Forecast for

Dupo IL

  • Tonight

    Tonight: Increasing clouds, with a low around 28. South wind 5 to 7 mph becoming west after midnight.

    Low: 28 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 41. West wind around 5 mph becoming calm.

    High: 41 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of rain, mainly after 5am. Mostly cloudy, with a low around 32. South wind around 5 mph.

    Low: 32 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday

    Sunday: A slight chance of rain before 3pm, then a slight chance of snow. Mostly cloudy, with a high near 41. South wind 5 to 10 mph becoming north in the afternoon. Chance of precipitation is 20%.

    High: 41 °F

    Slight Chance
    Rain then
    Slight Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 19. North wind 6 to 10 mph.

    Low: 19 °F

    Chance Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 28. South wind 5 to 7 mph becoming west after midnight.
Saturday
Partly sunny, with a high near 41. West wind around 5 mph becoming calm.
Saturday Night
A 30 percent chance of rain, mainly after 5am. Mostly cloudy, with a low around 32. South wind around 5 mph.
Sunday
A slight chance of rain before 3pm, then a slight chance of snow. Mostly cloudy, with a high near 41. South wind 5 to 10 mph becoming north in the afternoon. Chance of precipitation is 20%.
Sunday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 19. North wind 6 to 10 mph.
Monday
Mostly sunny, with a high near 34.
Monday Night
Partly cloudy, with a low around 24.
Tuesday
Mostly sunny, with a high near 50.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 48.
Wednesday Night
Mostly cloudy, with a low around 27.
Thursday
Mostly cloudy, with a high near 43.
Thursday Night
Mostly cloudy, with a low around 24.
Friday
Mostly sunny, with a high near 34.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Dupo IL
 38.51°N 90.21°W (Elev. 397 ft)
Last Update:
3:16 pm CST Dec 5, 2025
Forecast Valid:
3pm CST Dec 5, 2025-6pm CST Dec 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