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.

A Few Clouds

35°F

2°C

Humidity 48%
Wind Speed Calm
Barometer 30.42 in (1030.5 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Last update 28 Nov 1:53 pm CST
Extended Forecast for

Smithton IL

Winter Weather Advisory November 29, 12:00am until November 30, 12:00am
Click here for hazard details and duration
Winter Weather Advisory

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 39. Calm wind becoming southeast around 5 mph.

    High: 39 °F

    Partly Sunny

  • Tonight

    Tonight: Snow, mainly after 3am. Low around 30. Southeast wind 5 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    Low: 30 °F

    Cloudy then
    Snow

  • Saturday

    Saturday: Snow before 10am, then snow, possibly mixed with rain and sleet between 10am and 11am, then rain after 11am. High near 38. Southeast wind 11 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 1 to 3 inches possible.

    High: 38 °F

    Wintry Mix
    then Rain

  • Saturday Night

    Saturday Night: Rain and snow likely before 10pm, then a slight chance of rain between 10pm and midnight. Cloudy, with a low around 25. South wind 16 to 18 mph becoming west after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 25 °F

    Rain/Snow
    Likely then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 30. Northwest wind 9 to 16 mph, with gusts as high as 25 mph.

    High: 30 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 30.

    High: 30 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Monday Night

    Monday Night: A 50 percent chance of snow. Cloudy, with a low around 20.

    Low: 20 °F

    Chance Snow

  • Tuesday

    Tuesday: Partly sunny, with a high near 31.

    High: 31 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 39. Calm wind becoming southeast around 5 mph.
Tonight
Snow, mainly after 3am. Low around 30. Southeast wind 5 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Saturday
Snow before 10am, then snow, possibly mixed with rain and sleet between 10am and 11am, then rain after 11am. High near 38. Southeast wind 11 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 1 to 3 inches possible.
Saturday Night
Rain and snow likely before 10pm, then a slight chance of rain between 10pm and midnight. Cloudy, with a low around 25. South wind 16 to 18 mph becoming west after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Sunday
Mostly cloudy, with a high near 30. Northwest wind 9 to 16 mph, with gusts as high as 25 mph.
Sunday Night
Mostly cloudy, with a low around 20.
Monday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 30.
Monday Night
A 50 percent chance of snow. Cloudy, with a low around 20.
Tuesday
Partly sunny, with a high near 31.
Tuesday Night
Partly cloudy, with a low around 18.
Wednesday
Mostly sunny, with a high near 41.
Wednesday Night
Mostly cloudy, with a low around 21.
Thursday
Partly sunny, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Smithton IL
 38.41°N 89.99°W (Elev. 453 ft)
Last Update:
1:36 pm CST Nov 28, 2025
Forecast Valid:
2pm CST Nov 28, 2025-6pm CST Dec 4, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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