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.

Fair

74°F

23°C

Humidity 94%
Wind Speed Calm
Barometer 29.92 in (1012.5 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 16 Jul 1:53 am CDT
Extended Forecast for

Smithton IL

  • Overnight

    Overnight: Partly cloudy, with a low around 72. Southwest wind around 6 mph.

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Heat index values as high as 106. Southwest wind 6 to 8 mph. Chance of precipitation is 30%.

    High: 94 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 4am, then a slight chance of showers. Partly cloudy, with a low around 75. Southwest wind 5 to 8 mph. Chance of precipitation is 30%.

    Low: 75 °F

    Chance
    T-storms

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 92. Heat index values as high as 100. West wind 5 to 7 mph. Chance of precipitation is 50%.

    High: 92 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. North wind around 5 mph becoming calm in the evening.

    Low: 71 °F

    Chance
    T-storms

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86.

    High: 86 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.

    Low: 72 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 90.

    High: 90 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.

    Low: 75 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 72. Southwest wind around 6 mph.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Heat index values as high as 106. Southwest wind 6 to 8 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Partly cloudy, with a low around 75. Southwest wind 5 to 8 mph. Chance of precipitation is 30%.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 92. Heat index values as high as 100. West wind 5 to 7 mph. Chance of precipitation is 50%.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. North wind around 5 mph becoming calm in the evening.
Friday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86.
Friday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Saturday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 90.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Sunday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.
Tuesday
Sunny, with a high near 95.
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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:
10:07 pm CDT Jul 15, 2025
Forecast Valid:
2am CDT Jul 16, 2025-6pm CDT Jul 22, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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