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

77°F

25°C

Humidity 85%
Wind Speed S 6 mph
Barometer 29.90 in (1012.1 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 26 Jun 5:53 pm CDT
Extended Forecast for

2 Miles SSE Smithton IL

Flood Watch June 26, 06:55pm until June 26, 10:00pm
Click here for hazard details and duration
...
  •  
    Flood Watch June 26, 06:55pm until June 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Tonight

    Low: 68 °F

    T-storms
    Likely

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms, mainly after 4pm. Mostly cloudy, with a high near 84. West wind 5 to 7 mph.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 71. South wind around 6 mph.

    Low: 71 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 92. Heat index values as high as 111. South wind 5 to 9 mph.

    High: 92 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74. South wind 3 to 8 mph.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

Detailed Forecast

Tonight
Showers and thunderstorms likely before 7pm, then showers likely and possibly a thunderstorm between 7pm and 10pm, then a chance of showers and thunderstorms after 10pm. Mostly cloudy, with a low around 68. South wind 5 to 7 mph. Chance of precipitation is 70%.
Saturday
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Mostly cloudy, with a high near 84. West wind 5 to 7 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 71. South wind around 6 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 92. Heat index values as high as 111. South wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 74. South wind 3 to 8 mph.
Monday
Sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Sunny, with a high near 95.
Tuesday Night
Clear, with a low around 75.
Wednesday
Sunny, with a high near 94.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Sunny, with a high near 95.
Thursday Night
Mostly clear, with a low around 75.
Friday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Smithton IL
 38.39°N 89.99°W (Elev. 449 ft)
Last Update:
5:41 pm CDT Jun 26, 2026
Forecast Valid:
6pm CDT Jun 26, 2026-6pm CDT Jul 3, 2026
 
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