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.

Fair

26°F

-3°C

Humidity 46%
Wind Speed NE 6 mph
Barometer 30.29 in (1026.2 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 29 Jan 12:53 pm CST
Extended Forecast for

Smithton IL

  • This Afternoon

    This Afternoon: A 30 percent chance of snow, mainly after 5pm. Mostly cloudy, with a high near 25. Northeast wind around 7 mph.

    High: 25 °F

    Chance Snow

  • Tonight

    Tonight: Snow likely, mainly before 10pm. Cloudy, with a low around 6. North wind 5 to 7 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: Cloudy, then gradually becoming mostly sunny and cold, with a high near 18. North wind 5 to 11 mph.

    High: 18 °F

    Cold

  • Friday Night

    Friday Night: Cloudy during the early evening, then gradual clearing, with a low around 4. Wind chill values as low as -10. North wind 9 to 11 mph, with gusts as high as 22 mph.

    Low: 4 °F

    Gradual
    Clearing

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 18. Northwest wind 7 to 13 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

This Afternoon
A 30 percent chance of snow, mainly after 5pm. Mostly cloudy, with a high near 25. Northeast wind around 7 mph.
Tonight
Snow likely, mainly before 10pm. Cloudy, with a low around 6. North wind 5 to 7 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Friday
Cloudy, then gradually becoming mostly sunny and cold, with a high near 18. North wind 5 to 11 mph.
Friday Night
Cloudy during the early evening, then gradual clearing, with a low around 4. Wind chill values as low as -10. North wind 9 to 11 mph, with gusts as high as 22 mph.
Saturday
Mostly sunny and cold, with a high near 18. Northwest wind 7 to 13 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 24. Chance of precipitation is 30%.
Wednesday
A 30 percent chance of snow. Mostly cloudy, with a high near 35.
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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:
11:07 am CST Jan 29, 2026
Forecast Valid:
1pm CST Jan 29, 2026-6pm CST Feb 4, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation