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.

Thunderstorm in Vicinity Light Rain

68°F

20°C

Humidity 87%
Wind Speed SE 5 mph
Barometer 29.84 in (1010.3 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 15 Apr 8:53 pm CDT
Extended Forecast for

Smithton IL

  • Tonight

    Tonight: Showers and thunderstorms, mainly before 3am. Low around 62. Southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    Low: 62 °F

    T-storms

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 82. Southwest wind 6 to 9 mph.

    High: 82 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 59. South wind 3 to 5 mph.

    Low: 59 °F

    Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. South wind 5 to 15 mph, with gusts as high as 23 mph.

    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 52. South wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.

    Low: 52 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: A chance of showers and thunderstorms. Partly sunny, with a high near 64. Chance of precipitation is 50%.

    High: 64 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 41.

    Low: 41 °F

    Clear

Detailed Forecast

Tonight
Showers and thunderstorms, mainly before 3am. Low around 62. Southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Thursday
A 20 percent chance of showers and thunderstorms after 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 82. Southwest wind 6 to 9 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 59. South wind 3 to 5 mph.
Friday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. South wind 5 to 15 mph, with gusts as high as 23 mph.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 52. South wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 64. Chance of precipitation is 50%.
Saturday Night
Mostly clear, with a low around 40.
Sunday
Sunny, with a high near 65.
Sunday Night
Clear, with a low around 41.
Monday
Sunny, with a high near 71.
Monday Night
Mostly clear, with a low around 50.
Tuesday
Sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 55.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 78.
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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:
8:31 pm CDT Apr 15, 2026
Forecast Valid:
9pm CDT Apr 15, 2026-6pm CDT Apr 22, 2026
 
Forecast Discussion
 
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Additional Resources

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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