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.

Mostly Cloudy

65°F

18°C

Humidity 52%
Wind Speed S 9 mph
Barometer 30.03 in (1016.6 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 30 Mar 7:53 am CDT
Extended Forecast for

Smithton IL

  • Today

    Today: Mostly sunny, with a high near 82. Breezy, with a southwest wind 14 to 20 mph, with gusts as high as 31 mph.

    High: 82 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 63. South wind 8 to 15 mph, with gusts as high as 25 mph.

    Low: 63 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain and thunderstorms after 1pm. Partly sunny, with a high near 84. Breezy, with a south wind 13 to 22 mph, with gusts as high as 37 mph.

    High: 84 °F

    Breezy.
    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of rain, with thunderstorms also possible after 10pm. Mostly cloudy, with a low around 59. South wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    Low: 59 °F

    Chance Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 78. East wind 6 to 11 mph becoming south in the afternoon. Chance of precipitation is 80%.

    High: 78 °F

    Rain

  • Wednesday Night

    Wednesday Night: A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.

    Low: 64 °F

    Chance
    T-storms then
    Rain Likely

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 76. Chance of precipitation is 80%.

    High: 76 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.

    Low: 59 °F

    Rain Likely

  • Friday

    Friday: A chance of rain and thunderstorms. Mostly cloudy, with a high near 77. Chance of precipitation is 50%.

    High: 77 °F

    Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 82. Breezy, with a southwest wind 14 to 20 mph, with gusts as high as 31 mph.
Tonight
Partly cloudy, with a low around 63. South wind 8 to 15 mph, with gusts as high as 25 mph.
Tuesday
A 20 percent chance of rain and thunderstorms after 1pm. Partly sunny, with a high near 84. Breezy, with a south wind 13 to 22 mph, with gusts as high as 37 mph.
Tuesday Night
A chance of rain, with thunderstorms also possible after 10pm. Mostly cloudy, with a low around 59. South wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Wednesday
Rain and possibly a thunderstorm. High near 78. East wind 6 to 11 mph becoming south in the afternoon. Chance of precipitation is 80%.
Wednesday Night
A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Thursday
Rain and possibly a thunderstorm. High near 76. Chance of precipitation is 80%.
Thursday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.
Friday
A chance of rain and thunderstorms. Mostly cloudy, with a high near 77. Chance of precipitation is 50%.
Friday Night
Rain likely, mainly after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Saturday
Rain and thunderstorms likely. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.
Saturday Night
A 40 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 41.
Sunday
A 20 percent chance of rain. Mostly sunny, with a high near 59.
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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:
8:52 am CDT Mar 30, 2026
Forecast Valid:
9am CDT Mar 30, 2026-6pm CDT Apr 5, 2026
 
Forecast Discussion
 
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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