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

56°F

13°C

Humidity 39%
Wind Speed NW 20 G 32 mph
Barometer 30.09 in (1018.8 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 18 Apr 4:53 pm CDT
Extended Forecast for

5 Miles SW Smithton IL

  • Tonight

    Tonight: Clear, with a low around 39. Northwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

    Low: 39 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67. West wind 5 to 13 mph, with gusts as high as 22 mph.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40. Northeast wind 5 to 7 mph becoming calm after midnight.

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 67. Calm wind becoming southeast 5 to 7 mph in the morning.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 48. Southeast wind around 7 mph becoming south after midnight.

    Low: 48 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before 1am. Mostly clear, with a low around 55.

    Low: 55 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 39. Northwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 67. West wind 5 to 13 mph, with gusts as high as 22 mph.
Sunday Night
Mostly clear, with a low around 40. Northeast wind 5 to 7 mph becoming calm after midnight.
Monday
Sunny, with a high near 67. Calm wind becoming southeast 5 to 7 mph in the morning.
Monday Night
Mostly clear, with a low around 48. Southeast wind around 7 mph becoming south after midnight.
Tuesday
Sunny, with a high near 78.
Tuesday Night
A 20 percent chance of showers before 1am. Mostly clear, with a low around 55.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 75. Chance of precipitation is 70%.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 49.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW Smithton IL
 38.37°N 90.04°W (Elev. 499 ft)
Last Update:
1:26 pm CDT Apr 18, 2026
Forecast Valid:
5pm CDT Apr 18, 2026-6pm CDT Apr 25, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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