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

79°F

26°C

Humidity 58%
Wind Speed SW 10 G 21 mph
Barometer 29.99 in (1015.2 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 13 Apr 11:53 am CDT
Extended Forecast for

Smithton IL

  • Today

    Today: Mostly sunny, with a high near 82. South wind 13 to 16 mph, with gusts as high as 25 mph.

    High: 82 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 67. South wind 11 to 16 mph, with gusts as high as 28 mph.

    Low: 67 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Southwest wind 9 to 17 mph, with gusts as high as 25 mph.

    High: 86 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68. South wind 9 to 14 mph, with gusts as high as 23 mph.

    Low: 68 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 82. South wind 9 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62. Chance of precipitation is 70%.

    Low: 62 °F

    Showers
    Likely

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 82. South wind 13 to 16 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 67. South wind 11 to 16 mph, with gusts as high as 28 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Southwest wind 9 to 17 mph, with gusts as high as 25 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68. South wind 9 to 14 mph, with gusts as high as 23 mph.
Wednesday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 82. South wind 9 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62. Chance of precipitation is 70%.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.
Thursday Night
Mostly clear, with a low around 60.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Saturday
Showers and thunderstorms likely. Partly sunny, with a high near 75. Chance of precipitation is 60%.
Saturday Night
A 30 percent chance of showers. Partly cloudy, with a low around 44.
Sunday
Sunny, with a high near 64.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Smithton IL
 38.41°N 89.99°W (Elev. 453 ft)
Last Update:
8:56 am CDT Apr 13, 2026
Forecast Valid:
11am CDT Apr 13, 2026-6pm CDT Apr 19, 2026
 
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