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.

Fair

82°F

28°C

Humidity 55%
Wind Speed S 10 G 22 mph
Barometer 29.81 in (1009.2 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 14 Apr 6:53 pm CDT
Extended Forecast for

Smithton IL

  • Tonight

    Tonight: Isolated showers and thunderstorms after 3am. Increasing clouds, with a low around 68. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 68 °F

    Partly Cloudy
    then Isolated
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 5pm. Mostly cloudy, with a high near 81. South wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.

    High: 81 °F

    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 63. Southwest wind 8 to 10 mph. Chance of precipitation is 80%.

    Low: 63 °F

    Scattered
    T-storms then
    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 7am, then showers likely between 7am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 80. Southwest wind 8 to 11 mph. Chance of precipitation is 70%.

    High: 80 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59. South wind 3 to 6 mph.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.

    Low: 58 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Partly sunny, with a high near 71. Chance of precipitation is 60%.

    High: 71 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 41.

    Low: 41 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Isolated showers and thunderstorms after 3am. Increasing clouds, with a low around 68. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Wednesday
Showers and thunderstorms likely, mainly after 5pm. Mostly cloudy, with a high near 81. South wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
Wednesday Night
Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 63. Southwest wind 8 to 10 mph. Chance of precipitation is 80%.
Thursday
Showers likely and possibly a thunderstorm before 7am, then showers likely between 7am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 80. Southwest wind 8 to 11 mph. Chance of precipitation is 70%.
Thursday Night
Mostly clear, with a low around 59. South wind 3 to 6 mph.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Partly sunny, with a high near 71. Chance of precipitation is 60%.
Saturday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 41.
Sunday
Sunny, with a high near 62.
Sunday Night
Clear, with a low around 39.
Monday
Sunny, with a high near 68.
Monday Night
Mostly clear, with a low around 46.
Tuesday
Sunny, with a high near 72.
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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:
6:46 pm CDT Apr 14, 2026
Forecast Valid:
7pm CDT Apr 14, 2026-6pm CDT Apr 21, 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