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 75%
Wind Speed Calm
Barometer 30.09 in (1018.7 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 10 Oct 8:53 am CDT
Extended Forecast for

Dupo IL

  • Today

    Today: Increasing clouds, with a high near 81. East wind 3 to 6 mph.

    High: 81 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. East wind around 6 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 88. Calm wind.

    High: 88 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 64. Light and variable wind becoming southwest around 6 mph in the evening.

    Low: 64 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 94. Southwest wind 6 to 11 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 65.

    Low: 65 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 82. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

Detailed Forecast

Today
Increasing clouds, with a high near 81. East wind 3 to 6 mph.
Tonight
Mostly cloudy, with a low around 56. East wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 88. Calm wind.
Sunday Night
Mostly clear, with a low around 64. Light and variable wind becoming southwest around 6 mph in the evening.
Columbus Day
Sunny, with a high near 94. Southwest wind 6 to 11 mph.
Monday Night
Mostly clear, with a low around 71.
Tuesday
Sunny, with a high near 91.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 65.
Wednesday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 82. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Thursday
Showers and thunderstorms likely. Partly sunny, with a high near 79. Chance of precipitation is 60%.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 56.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 71.
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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:
8:36 am CDT Oct 10, 2026
Forecast Valid:
9am CDT Oct 10, 2026-6pm CDT Oct 16, 2026
 
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