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.

Fog/Mist

56°F

13°C

Humidity 97%
Wind Speed Calm
Barometer 30.06 in (1017.9 mb)
Dewpoint 55°F (13°C)
Visibility 3.00 mi
Last update 25 Dec 6:53 am CST
Extended Forecast for

4 Miles WSW Smithton IL

  • Christmas Day

    Christmas Day: Patchy dense fog before 11am. Otherwise, mostly cloudy, with a high near 69. Calm wind becoming east around 5 mph in the afternoon.

    High: 69 °F

    Patchy Dense
    Fog then
    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 57. Southeast wind 5 to 7 mph becoming south after midnight.

    Low: 57 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 72. West wind 5 to 10 mph becoming light and variable in the afternoon.

    High: 72 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 68. Light east wind becoming south 5 to 10 mph in the morning.

    High: 68 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Cloudy, with a low around 58.

    Low: 58 °F

    Cloudy

  • Sunday

    Sunday: A chance of rain, then rain likely and possibly a thunderstorm after noon. Cloudy, with a high near 68. Chance of precipitation is 70%.

    High: 68 °F

    Rain Likely

  • Sunday Night

    Sunday Night: A chance of rain and snow before midnight. Mostly cloudy, with a low around 20. Chance of precipitation is 40%.

    Low: 20 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Sunny, with a high near 28.

    High: 28 °F

    Sunny

Detailed Forecast

Christmas Day
Patchy dense fog before 11am. Otherwise, mostly cloudy, with a high near 69. Calm wind becoming east around 5 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 57. Southeast wind 5 to 7 mph becoming south after midnight.
Friday
Mostly sunny, with a high near 72. West wind 5 to 10 mph becoming light and variable in the afternoon.
Friday Night
Partly cloudy, with a low around 46. Calm wind.
Saturday
Partly sunny, with a high near 68. Light east wind becoming south 5 to 10 mph in the morning.
Saturday Night
Cloudy, with a low around 58.
Sunday
A chance of rain, then rain likely and possibly a thunderstorm after noon. Cloudy, with a high near 68. Chance of precipitation is 70%.
Sunday Night
A chance of rain and snow before midnight. Mostly cloudy, with a low around 20. Chance of precipitation is 40%.
Monday
Sunny, with a high near 28.
Monday Night
Mostly clear, with a low around 18.
Tuesday
Sunny, with a high near 36.
Tuesday Night
Mostly clear, with a low around 23.
Wednesday
Partly sunny, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Smithton IL
 38.37°N 90.04°W (Elev. 499 ft)
Last Update:
4:41 am CST Dec 25, 2025
Forecast Valid:
7am CST Dec 25, 2025-6pm CST Dec 31, 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