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

75°F

24°C

Humidity 52%
Wind Speed E 5 mph
Barometer 30.07 in (1018.1 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 10 Oct 12:53 pm CDT
Extended Forecast for

Swansea IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 80. Southeast wind 6 to 8 mph.

    High: 80 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 53. Southeast wind 5 to 7 mph becoming calm in the evening.

    Low: 53 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 87. Light and variable wind.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 63. Calm wind becoming south around 5 mph in the evening.

    Low: 63 °F

    Increasing
    Clouds

  • Columbus Day

    Columbus Day: Sunny, with a high near 94. Southwest wind 5 to 11 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 69.

    Low: 69 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 85. Chance of precipitation is 70%.

    High: 85 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Partly sunny, with a high near 80. Southeast wind 6 to 8 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 53. Southeast wind 5 to 7 mph becoming calm in the evening.
Sunday
Sunny, with a high near 87. Light and variable wind.
Sunday Night
Increasing clouds, with a low around 63. Calm wind becoming south around 5 mph in the evening.
Columbus Day
Sunny, with a high near 94. Southwest wind 5 to 11 mph.
Monday Night
Clear, with a low around 69.
Tuesday
Sunny, with a high near 92.
Tuesday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 70.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 85. Chance of precipitation is 70%.
Wednesday Night
Showers likely, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Thursday
Showers and thunderstorms likely. Mostly cloudy, with a high near 78. Chance of precipitation is 60%.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Friday
A 20 percent chance of showers. Partly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Swansea IL
 38.55°N 90.01°W (Elev. 548 ft)
Last Update:
1:26 pm CDT Oct 10, 2026
Forecast Valid:
1pm CDT Oct 10, 2026-6pm CDT Oct 16, 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