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.

Overcast

28°F

-2°C

Humidity 88%
Wind Speed S 8 mph
Barometer 30.13 in (1020.8 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 3 Dec 8:53 am CST
Extended Forecast for

Swansea IL

  • Today

    Today: A chance of sprinkles between 4pm and 5pm, then a slight chance of snow after 5pm. Cloudy, with a high near 37. South wind 5 to 8 mph becoming calm in the afternoon. Chance of precipitation is 20%.

    High: 37 °F

    Cloudy then
    Slight Chance
    Sprinkles/Snow

  • Tonight

    Tonight: A 40 percent chance of snow, mainly before 1am. Cloudy, with a low around 15. Light north wind increasing to 8 to 13 mph in the evening. Winds could gust as high as 21 mph.

    Low: 15 °F

    Chance Snow

  • Thursday

    Thursday: Cloudy through mid morning, then gradual clearing, with a high near 24. North wind 5 to 9 mph becoming light northeast in the afternoon.

    High: 24 °F

    Gradual
    Clearing

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 13. Light and variable wind.

    Low: 13 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 39. South wind 3 to 6 mph.

    High: 39 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 37.

    High: 37 °F

    Partly Sunny
    then Slight
    Chance Rain

Detailed Forecast

Today
A chance of sprinkles between 4pm and 5pm, then a slight chance of snow after 5pm. Cloudy, with a high near 37. South wind 5 to 8 mph becoming calm in the afternoon. Chance of precipitation is 20%.
Tonight
A 40 percent chance of snow, mainly before 1am. Cloudy, with a low around 15. Light north wind increasing to 8 to 13 mph in the evening. Winds could gust as high as 21 mph.
Thursday
Cloudy through mid morning, then gradual clearing, with a high near 24. North wind 5 to 9 mph becoming light northeast in the afternoon.
Thursday Night
Partly cloudy, with a low around 13. Light and variable wind.
Friday
Mostly sunny, with a high near 39. South wind 3 to 6 mph.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Partly sunny, with a high near 38.
Saturday Night
Mostly cloudy, with a low around 26.
Sunday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 37.
Sunday Night
Mostly cloudy, with a low around 24.
Monday
Partly sunny, with a high near 35.
Monday Night
Mostly cloudy, with a low around 27.
Tuesday
Mostly sunny, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Swansea IL
 38.55°N 90.01°W (Elev. 548 ft)
Last Update:
9:11 am CST Dec 3, 2025
Forecast Valid:
10am CST Dec 3, 2025-6pm CST Dec 9, 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