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.

Snow Fog/Mist

26°F

-3°C

Humidity 88%
Wind Speed Calm
Barometer 30.19 in (1022.9 mb)
Dewpoint 23°F (-5°C)
Visibility 1.25 mi
Last update 1 Dec 2:53 pm CST
Extended Forecast for

Smithton IL

Winter Weather Advisory December 1, 03:35pm until December 2, 12:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory December 1, 03:35pm until December 2, 12:00am

    NOW until 12:00am Tue

    Winter Weather Advisory

  • This Afternoon

    High: 27 °F

    Chance Snow

  • Tonight

    Tonight: Snow, mainly before 1am. Low around 20. Calm wind becoming northwest 5 to 7 mph in the evening. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 20 °F

    Snow then
    Slight Chance
    Snow

  • Tuesday

    Tuesday: Partly sunny, with a high near 29. Northwest wind 5 to 7 mph becoming calm in the afternoon.

    High: 29 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 20. Calm wind becoming south around 6 mph after midnight.

    Low: 20 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 41. South wind 5 to 7 mph becoming west in the afternoon.

    High: 41 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 23.

    High: 23 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 12.

    Low: 12 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
A 50 percent chance of snow. Cloudy, with a high near 27. Calm wind.
Tonight
Snow, mainly before 1am. Low around 20. Calm wind becoming northwest 5 to 7 mph in the evening. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Tuesday
Partly sunny, with a high near 29. Northwest wind 5 to 7 mph becoming calm in the afternoon.
Tuesday Night
Mostly clear, with a low around 20. Calm wind becoming south around 6 mph after midnight.
Wednesday
Partly sunny, with a high near 41. South wind 5 to 7 mph becoming west in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 15.
Thursday
Mostly sunny, with a high near 23.
Thursday Night
Partly cloudy, with a low around 12.
Friday
A 20 percent chance of snow before noon. Mostly sunny, with a high near 39.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Partly sunny, with a high near 41.
Saturday Night
Mostly cloudy, with a low around 27.
Sunday
Mostly cloudy, with a high near 38.
Sunday Night
Mostly cloudy, with a low around 19.
Monday
Partly sunny, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Smithton IL
 38.44°N 89.99°W (Elev. 449 ft)
Last Update:
3:15 pm CST Dec 1, 2025
Forecast Valid:
3pm CST Dec 1, 2025-6pm CST Dec 8, 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