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.

Fair

77°F

25°C

Humidity 50%
Wind Speed S 5 mph
Barometer 29.80 in (1008.9 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 17 Oct 6:53 pm CDT
Extended Forecast for

Smithton IL

  • Tonight

    Tonight: Mostly clear, with a low around 61. South wind 3 to 8 mph.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. Some of the storms could produce heavy rainfall. High near 75. South wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.

    High: 75 °F

    Chance
    T-storms then
    Heavy Rain

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 50. Southwest wind 8 to 17 mph becoming northwest after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 100%.

    Low: 50 °F

    Heavy Rain

  • Sunday

    Sunday: Mostly cloudy through mid morning, then gradual clearing, with a high near 64. Northwest wind 16 to 18 mph, with gusts as high as 28 mph.

    High: 64 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 42. West wind around 6 mph becoming calm.

    Low: 42 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Tuesday Night

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

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 61. South wind 3 to 8 mph.
Saturday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. Some of the storms could produce heavy rainfall. High near 75. South wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 50. Southwest wind 8 to 17 mph becoming northwest after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 100%.
Sunday
Mostly cloudy through mid morning, then gradual clearing, with a high near 64. Northwest wind 16 to 18 mph, with gusts as high as 28 mph.
Sunday Night
Clear, with a low around 42. West wind around 6 mph becoming calm.
Monday
Sunny, with a high near 73.
Monday Night
Mostly clear, with a low around 49.
Tuesday
Sunny, with a high near 64.
Tuesday Night
Mostly clear, with a low around 40.
Wednesday
Sunny, with a high near 65.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 45.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 69.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Smithton IL
 38.41°N 89.99°W (Elev. 453 ft)
Last Update:
7:21 pm CDT Oct 17, 2025
Forecast Valid:
7pm CDT Oct 17, 2025-6pm CDT Oct 24, 2025
 
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