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

70°F

21°C

Humidity 35%
Wind Speed S 9 mph
Barometer 30.03 in (1016.7 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 29 Mar 6:53 pm CDT
Extended Forecast for

Smithton IL

  • Tonight

    Tonight: Partly cloudy, with a low around 55. South wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 81. Southwest wind 11 to 17 mph, with gusts as high as 28 mph.

    High: 81 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63. South wind around 14 mph, with gusts as high as 25 mph.

    Low: 63 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after 1pm. Mostly sunny, with a high near 84. Breezy, with a south wind 14 to 20 mph, with gusts as high as 30 mph.

    High: 84 °F

    Breezy.
    Mostly Sunny
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. South wind 8 to 13 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%.

    Low: 58 °F

    Chance Rain
    then Rain
    Likely

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 70. Chance of precipitation is 80%.

    High: 70 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 55. Chance of precipitation is 80%.

    Low: 55 °F

    Rain

  • Thursday

    Thursday: Rain. High near 67. Chance of precipitation is 80%.

    High: 67 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely, mainly before 1am. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.

    Low: 49 °F

    Rain Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 55. South wind 8 to 10 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 81. Southwest wind 11 to 17 mph, with gusts as high as 28 mph.
Monday Night
Partly cloudy, with a low around 63. South wind around 14 mph, with gusts as high as 25 mph.
Tuesday
A 20 percent chance of rain after 1pm. Mostly sunny, with a high near 84. Breezy, with a south wind 14 to 20 mph, with gusts as high as 30 mph.
Tuesday Night
A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. South wind 8 to 13 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%.
Wednesday
Rain and possibly a thunderstorm. High near 70. Chance of precipitation is 80%.
Wednesday Night
Rain and possibly a thunderstorm. Low around 55. Chance of precipitation is 80%.
Thursday
Rain. High near 67. Chance of precipitation is 80%.
Thursday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 73.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 56.
Saturday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
Saturday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 48. Chance of precipitation is 60%.
Sunday
A 40 percent chance of rain. Mostly cloudy, with a high near 61.
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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:
6:01 pm CDT Mar 29, 2026
Forecast Valid:
7pm CDT Mar 29, 2026-6pm CDT Apr 5, 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