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.

Mostly Cloudy

22°F

-6°C

Humidity 55%
Wind Speed NE 6 mph
Barometer 30.28 in (1025.9 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 29 Jan 5:53 am CST
Extended Forecast for

5 Miles SW Smithton IL

  • Today

    Today: A 20 percent chance of snow after 5pm. Mostly cloudy, with a high near 25. Northeast wind 5 to 7 mph.

    High: 25 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Tonight

    Tonight: Snow likely, mainly before 8pm. Mostly cloudy, with a low around 6. North wind around 6 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 6 °F

    Snow Likely
    then Slight
    Chance Snow

  • Friday

    Friday: Partly sunny and cold, with a high near 18. North wind 6 to 10 mph.

    High: 18 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 4. Wind chill values as low as -10. North wind 8 to 10 mph.

    Low: 4 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny and cold, with a high near 18. Northwest wind 7 to 11 mph.

    High: 18 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 1.

    Low: 1 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 28.

    High: 28 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.

    Low: 18 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 35.

    High: 35 °F

    Partly Sunny

Detailed Forecast

Today
A 20 percent chance of snow after 5pm. Mostly cloudy, with a high near 25. Northeast wind 5 to 7 mph.
Tonight
Snow likely, mainly before 8pm. Mostly cloudy, with a low around 6. North wind around 6 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Friday
Partly sunny and cold, with a high near 18. North wind 6 to 10 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 4. Wind chill values as low as -10. North wind 8 to 10 mph.
Saturday
Sunny and cold, with a high near 18. Northwest wind 7 to 11 mph.
Saturday Night
Mostly clear, with a low around 1.
Sunday
Partly sunny, with a high near 28.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.
Monday
Partly sunny, with a high near 35.
Monday Night
Mostly cloudy, with a low around 21.
Tuesday
Mostly cloudy, with a high near 36.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 23. Chance of precipitation is 30%.
Wednesday
A 30 percent chance of snow. Mostly cloudy, with a high near 36.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW Smithton IL
 38.37°N 90.04°W (Elev. 499 ft)
Last Update:
4:11 am CST Jan 29, 2026
Forecast Valid:
6am CST Jan 29, 2026-6pm CST Feb 4, 2026
 
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