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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Smithton IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 66. West wind around 6 mph becoming calm.

    High: 66 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 40 percent chance of rain and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 58. Calm wind becoming south 5 to 7 mph after midnight.

    Low: 58 °F

    Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of rain and thunderstorms before 7am. Partly sunny, with a high near 74. South wind 8 to 18 mph, with gusts as high as 28 mph.

    High: 74 °F

    Slight Chance
    T-storms then
    Partly Sunny

  • Friday Night

    Friday Night: Rain and possibly a thunderstorm after midnight. Low around 62. South wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%.

    Low: 62 °F

    Mostly Cloudy
    then Rain

  • Saturday

    Saturday: Rain likely and possibly a thunderstorm before noon, then a slight chance of rain. Mostly cloudy, with a high near 69. Southwest wind 9 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 60%.

    High: 69 °F

    Rain Likely
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 66. West wind around 6 mph becoming calm.
Tonight
A 40 percent chance of rain and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 58. Calm wind becoming south 5 to 7 mph after midnight.
Friday
A 20 percent chance of rain and thunderstorms before 7am. Partly sunny, with a high near 74. South wind 8 to 18 mph, with gusts as high as 28 mph.
Friday Night
Rain and possibly a thunderstorm after midnight. Low around 62. South wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%.
Saturday
Rain likely and possibly a thunderstorm before noon, then a slight chance of rain. Mostly cloudy, with a high near 69. Southwest wind 9 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 40.
Sunday
Sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 48.
Monday
Sunny, with a high near 77.
Monday Night
A slight chance of rain, then a chance of rain and thunderstorms after midnight. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Tuesday
Rain likely and possibly a thunderstorm. Partly sunny, with a high near 78. Chance of precipitation is 70%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 56. Chance of precipitation is 80%.
Wednesday
Rain likely. Mostly cloudy, with a high near 67. Chance of precipitation is 70%.
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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:
1:56 pm CST Mar 5, 2026
Forecast Valid:
2pm CST Mar 5, 2026-6pm CDT Mar 11, 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