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.

Overcast

47°F

8°C

Humidity 90%
Wind Speed SW 7 mph
Barometer 29.77 in (1008.1 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 13 Jan 11:53 pm CST
Extended Forecast for

4 Miles WSW Smithton IL

  • Overnight

    Overnight: A 30 percent chance of rain, mainly before 1am. Cloudy, with a low around 39. Southwest wind 7 to 13 mph becoming northwest. Winds could gust as high as 25 mph.

    Low: 39 °F

    Chance Rain

  • Wednesday

    Wednesday: A chance of sprinkles and flurries between 8am and 11am. Cloudy through mid morning, then gradual clearing, with a temperature falling to around 31 by 5pm. Breezy, with a north wind 15 to 22 mph, with gusts as high as 31 mph.

    High: 40 °F⇓

    Breezy.
    Chance
    Sprinkles/Flurries
    then
    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Clear, with a low around 17. Northwest wind 8 to 14 mph, with gusts as high as 26 mph.

    Low: 17 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 34. Northwest wind 5 to 8 mph becoming south in the afternoon.

    High: 34 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 26. South wind 5 to 11 mph becoming west after midnight. Winds could gust as high as 22 mph.

    Low: 26 °F

    Slight Chance
    Snow

  • Friday

    Friday: Partly sunny, with a high near 45. Breezy.

    High: 45 °F

    Mostly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Friday Night

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

    Low: 20 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 27.

    High: 27 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 11.

    Low: 11 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of rain, mainly before 1am. Cloudy, with a low around 39. Southwest wind 7 to 13 mph becoming northwest. Winds could gust as high as 25 mph.
Wednesday
A chance of sprinkles and flurries between 8am and 11am. Cloudy through mid morning, then gradual clearing, with a temperature falling to around 31 by 5pm. Breezy, with a north wind 15 to 22 mph, with gusts as high as 31 mph.
Wednesday Night
Clear, with a low around 17. Northwest wind 8 to 14 mph, with gusts as high as 26 mph.
Thursday
Sunny, with a high near 34. Northwest wind 5 to 8 mph becoming south in the afternoon.
Thursday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 26. South wind 5 to 11 mph becoming west after midnight. Winds could gust as high as 22 mph.
Friday
Partly sunny, with a high near 45. Breezy.
Friday Night
Mostly cloudy, with a low around 20.
Saturday
Partly sunny, with a high near 27.
Saturday Night
Partly cloudy, with a low around 11.
Sunday
Sunny, with a high near 31.
Sunday Night
Mostly clear, with a low around 17.
M.L.King Day
Sunny, with a high near 35.
Monday Night
Mostly clear, with a low around 12.
Tuesday
Mostly sunny, with a high near 33.
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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:
12:21 am CST Jan 14, 2026
Forecast Valid:
12am CST Jan 14, 2026-6pm CST Jan 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation