National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

35°F

2°C

Humidity 96%
Wind Speed Calm
Barometer 30.04 in (1017.2 mb)
Dewpoint 34°F (1°C)
Visibility 7.00 mi
Last update 16 Feb 1:53 am CST
Extended Forecast for

Dupo IL

Dense Fog Advisory until February 16, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until February 16, 09:00am

    NOW until 9:00am Mon

    Dense Fog Advisory

  • Overnight

    Low: 37 °F

    Patchy Dense
    Fog

  • Washington's Birthday

    Washington's Birthday: Patchy dense fog between 7am and 8am. Otherwise, mostly sunny, with a high near 66. Light south wind increasing to 5 to 10 mph in the morning.

    High: 66 °F

    Patchy Dense
    Fog then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44. South wind 6 to 8 mph.

    Low: 44 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 65. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 65 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 58. South wind 15 to 18 mph, with gusts as high as 31 mph.

    Low: 58 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 74. Chance of precipitation is 20%.

    High: 74 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

Detailed Forecast

Overnight
Patchy dense fog before 3am, then patchy dense fog after 4am. Otherwise, partly cloudy, with a low around 37. Light south wind.
Washington's Birthday
Patchy dense fog between 7am and 8am. Otherwise, mostly sunny, with a high near 66. Light south wind increasing to 5 to 10 mph in the morning.
Monday Night
Partly cloudy, with a low around 44. South wind 6 to 8 mph.
Tuesday
Mostly cloudy, with a high near 65. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph.
Tuesday Night
Mostly cloudy, with a low around 58. South wind 15 to 18 mph, with gusts as high as 31 mph.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
A slight chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 74. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Partly sunny, with a high near 59.
Friday Night
A 30 percent chance of rain. Low around 37.
Saturday
High near 53.
Saturday Night
Low around 34.
Sunday
High near 51.
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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:
12:26 am CST Feb 16, 2026
Forecast Valid:
2am CST Feb 16, 2026-6pm CST Feb 22, 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