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.

Rain Fog/Mist

51°F

11°C

Humidity 89%
Wind Speed NW 20 G 30 mph
Barometer 29.82 in (1009.6 mb)
Dewpoint 48°F (9°C)
Visibility 5.00 mi
Wind Chill45°F (7°C)
Last update 18 Apr 4:53 am CDT
Extended Forecast for

4 Miles WSW Smithton IL

  • Overnight

    Overnight: Showers. Steady temperature around 57. North wind around 6 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.

    Low: 57 °F

    Showers

  • Saturday

    Saturday: Showers likely, mainly before 8am. Cloudy through mid morning, then gradual clearing, with a high near 58. Northwest wind 13 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 58 °F

    Showers
    Likely then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 39. Northwest wind 5 to 10 mph becoming light and variable after midnight.

    Low: 39 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67. Light west wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 22 mph.

    High: 67 °F

    Sunny

  • Sunday Night

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

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 67.

    High: 67 °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 79.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

Detailed Forecast

Overnight
Showers. Steady temperature around 57. North wind around 6 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.
Saturday
Showers likely, mainly before 8am. Cloudy through mid morning, then gradual clearing, with a high near 58. Northwest wind 13 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Saturday Night
Clear, with a low around 39. Northwest wind 5 to 10 mph becoming light and variable after midnight.
Sunday
Sunny, with a high near 67. Light west wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 22 mph.
Sunday Night
Mostly clear, with a low around 40. Northwest wind 5 to 7 mph becoming calm after midnight.
Monday
Sunny, with a high near 67.
Monday Night
Mostly clear, with a low around 49.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Sunny, with a high near 83.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 78. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Smithton IL
 38.37°N 90.04°W (Elev. 499 ft)
Last Update:
5:41 am CDT Apr 18, 2026
Forecast Valid:
5am CDT Apr 18, 2026-6pm CDT Apr 24, 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