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

32°F

0°C

Humidity 96%
Wind Speed Calm
Barometer 29.95 in (1014.4 mb)
Dewpoint 31°F (-1°C)
Visibility 8.00 mi
Last update 27 Feb 1:53 am CST
Extended Forecast for

Smithton IL

  • Overnight

    Overnight: Mostly clear, with a low around 36. South wind 3 to 5 mph.

    Low: 36 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 71. Light south wind becoming southwest 9 to 14 mph in the morning. Winds could gust as high as 22 mph.

    High: 71 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 40. West wind 5 to 8 mph becoming light and variable after midnight.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of rain after noon. Mostly sunny, with a high near 66. Light and variable wind becoming south 5 to 8 mph in the morning.

    High: 66 °F

    Sunny then
    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31. Southeast wind 7 to 11 mph becoming north in the evening. Winds could gust as high as 20 mph.

    Low: 31 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain and snow. Low around 33. Chance of precipitation is 80%.

    Low: 33 °F

    Rain/Snow

  • Monday

    Monday: A chance of rain and snow before noon, then a slight chance of rain. Mostly cloudy, with a high near 44. Chance of precipitation is 40%.

    High: 44 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain

Detailed Forecast

Overnight
Mostly clear, with a low around 36. South wind 3 to 5 mph.
Friday
Sunny, with a high near 71. Light south wind becoming southwest 9 to 14 mph in the morning. Winds could gust as high as 22 mph.
Friday Night
Mostly clear, with a low around 40. West wind 5 to 8 mph becoming light and variable after midnight.
Saturday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 66. Light and variable wind becoming south 5 to 8 mph in the morning.
Saturday Night
Partly cloudy, with a low around 31. Southeast wind 7 to 11 mph becoming north in the evening. Winds could gust as high as 20 mph.
Sunday
Mostly cloudy, with a high near 46.
Sunday Night
Rain and snow. Low around 33. Chance of precipitation is 80%.
Monday
A chance of rain and snow before noon, then a slight chance of rain. Mostly cloudy, with a high near 44. Chance of precipitation is 40%.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 36.
Tuesday
Rain likely. Cloudy, with a high near 54. Chance of precipitation is 70%.
Tuesday Night
Rain likely and possibly a thunderstorm. Cloudy, with a low around 43. Chance of precipitation is 70%.
Wednesday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 63. Chance of precipitation is 60%.
Wednesday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.
Thursday
Rain likely. Partly sunny, with a high near 69. Chance of precipitation is 60%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Smithton IL
 38.41°N 89.99°W (Elev. 453 ft)
Last Update:
1:16 am CST Feb 27, 2026
Forecast Valid:
2am CST Feb 27, 2026-6pm CST Mar 5, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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