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

67°F

19°C

Humidity 29%
Wind Speed S 9 G 20 mph
Barometer 30.01 in (1016.1 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 6 Nov 1:53 pm CST
Extended Forecast for

Swansea IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 66. Southeast wind around 14 mph, with gusts as high as 22 mph.

    High: 66 °F

    Mostly Sunny

  • Tonight

    Tonight: A slight chance of rain between 2am and 4am. Mostly cloudy, with a low around 53. Southeast wind 9 to 11 mph becoming southwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

    Low: 53 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Friday

    Friday: Mostly cloudy through mid morning, then gradual clearing, with a high near 71. West wind 8 to 10 mph.

    High: 71 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 45. West wind around 6 mph becoming calm in the evening.

    Low: 45 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of rain after noon. Partly sunny, with a high near 67. Light and variable wind becoming west 5 to 10 mph in the morning.

    High: 67 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain
    then Mostly
    Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 25 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 42.

    High: 42 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 66. Southeast wind around 14 mph, with gusts as high as 22 mph.
Tonight
A slight chance of rain between 2am and 4am. Mostly cloudy, with a low around 53. Southeast wind 9 to 11 mph becoming southwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Friday
Mostly cloudy through mid morning, then gradual clearing, with a high near 71. West wind 8 to 10 mph.
Friday Night
Mostly clear, with a low around 45. West wind around 6 mph becoming calm in the evening.
Saturday
A 20 percent chance of rain after noon. Partly sunny, with a high near 67. Light and variable wind becoming west 5 to 10 mph in the morning.
Saturday Night
A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 36.
Sunday
Mostly sunny, with a high near 42.
Sunday Night
Partly cloudy, with a low around 25.
Monday
Sunny, with a high near 42.
Monday Night
Mostly clear, with a low around 27.
Veterans Day
Mostly sunny, with a high near 55.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Swansea IL
 38.55°N 89.98°W (Elev. 551 ft)
Last Update:
1:56 pm CST Nov 6, 2025
Forecast Valid:
2pm CST Nov 6, 2025-6pm CST Nov 12, 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