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.

A Few Clouds

41°F

5°C

Humidity 53%
Wind Speed S 3 mph
Barometer 29.66 in (1004.4 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 25 Feb 12:53 am CST
Extended Forecast for

Swansea IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 37. West wind around 6 mph becoming calm.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 52. Calm wind becoming north around 5 mph.

    High: 52 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain between 9pm and 5am. Mostly cloudy, with a low around 35. Northeast wind 3 to 6 mph. Chance of precipitation is 50%.

    Low: 35 °F

    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 53. East wind around 5 mph becoming light and variable in the afternoon.

    High: 53 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34. Light south wind.

    Low: 34 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after midnight. Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

Overnight
Mostly cloudy, with a low around 37. West wind around 6 mph becoming calm.
Wednesday
Partly sunny, with a high near 52. Calm wind becoming north around 5 mph.
Wednesday Night
A chance of rain between 9pm and 5am. Mostly cloudy, with a low around 35. Northeast wind 3 to 6 mph. Chance of precipitation is 50%.
Thursday
Mostly sunny, with a high near 53. East wind around 5 mph becoming light and variable in the afternoon.
Thursday Night
Mostly clear, with a low around 34. Light south wind.
Friday
Sunny, with a high near 68.
Friday Night
Mostly clear, with a low around 42.
Saturday
Mostly sunny, with a high near 64.
Saturday Night
A 20 percent chance of rain after midnight. Partly cloudy, with a low around 33.
Sunday
A chance of rain before noon, then a chance of rain and snow. Mostly cloudy, with a high near 47. Chance of precipitation is 40%.
Sunday Night
Rain and snow likely. Mostly cloudy, with a low around 33. Chance of precipitation is 60%.
Monday
A 40 percent chance of rain. Mostly cloudy, with a high near 43.
Monday Night
A 40 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 31.
Tuesday
A 50 percent chance of rain. Mostly cloudy, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Swansea IL
 38.52°N 89.98°W (Elev. 509 ft)
Last Update:
12:31 am CST Feb 25, 2026
Forecast Valid:
1am CST Feb 25, 2026-6pm CST Mar 3, 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