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

68°F

20°C

Humidity 59%
Wind Speed NW 9 mph
Barometer 29.72 in (1006.0 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 15 Nov 5:53 pm CST
Extended Forecast for

Smithton IL

  • Tonight

    Tonight: Mostly clear, with a low around 43. North wind around 9 mph.

    Low: 43 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 59. North wind 5 to 9 mph becoming light in the afternoon.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 33. Light and variable wind.

    Low: 33 °F

    Clear

  • Monday

    Monday: A 20 percent chance of showers after 3pm. Mostly sunny, with a high near 60. Light east wind becoming southeast 5 to 10 mph in the morning.

    High: 60 °F

    Sunny then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 47. Southeast wind around 9 mph. Chance of precipitation is 70%.

    Low: 47 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 73. Chance of precipitation is 20%.

    High: 73 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 65.

    High: 65 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.

    Low: 52 °F

    Chance Rain
    then Rain
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 43. North wind around 9 mph.
Sunday
Sunny, with a high near 59. North wind 5 to 9 mph becoming light in the afternoon.
Sunday Night
Clear, with a low around 33. Light and variable wind.
Monday
A 20 percent chance of showers after 3pm. Mostly sunny, with a high near 60. Light east wind becoming southeast 5 to 10 mph in the morning.
Monday Night
A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 47. Southeast wind around 9 mph. Chance of precipitation is 70%.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 73. Chance of precipitation is 20%.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 49.
Wednesday
A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 65.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Thursday
Rain and possibly a thunderstorm. High near 65. Chance of precipitation is 80%.
Thursday Night
Rain and possibly a thunderstorm. Low around 53. Chance of precipitation is 80%.
Friday
Rain likely. Partly sunny, with a high near 63. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 43.
Saturday
A 20 percent chance of rain. Mostly sunny, with a high near 56.
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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:
4:46 pm CST Nov 15, 2025
Forecast Valid:
6pm CST Nov 15, 2025-6pm CST Nov 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