National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

62°F

17°C

Humidity 100%
Wind Speed Calm
Barometer 30.09 in (1018.5 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 28 Aug 3:53 am CDT
Extended Forecast for

Smithton IL

  • Today

    Today: Sunny, with a high near 86. Calm wind becoming northeast around 5 mph.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 87. Calm wind becoming south around 5 mph in the afternoon.

    High: 87 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 65. South wind 3 to 5 mph.

    Low: 65 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 92. South wind 5 to 10 mph.

    High: 92 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 86. Calm wind becoming northeast around 5 mph.
Tonight
Mostly clear, with a low around 63. Calm wind.
Saturday
Mostly sunny, with a high near 87. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 65. South wind 3 to 5 mph.
Sunday
Sunny, with a high near 92. South wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 71.
Monday
Sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 74.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny and hot, with a high near 97.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
A 20 percent chance of showers. Sunny and hot, with a high near 98.
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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:
3:31 am CDT Aug 28, 2026
Forecast Valid:
4am CDT Aug 28, 2026-6pm CDT Sep 3, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation