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.

Partly Cloudy

71°F

22°C

Humidity 79%
Wind Speed S 9 mph
Barometer 29.85 in (1010.6 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 15 Apr 6:53 pm CDT
Extended Forecast for

Swansea IL

  • Tonight

    Tonight: Showers and thunderstorms before 4am, then a chance of showers. Low around 61. Southwest wind 8 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

    Low: 61 °F

    T-storms

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 82. West wind 6 to 9 mph.

    High: 82 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 58. South wind 3 to 5 mph.

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. South wind 5 to 14 mph, with gusts as high as 24 mph.

    High: 85 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 53. South wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

    Low: 53 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms. Partly sunny, with a steady temperature around 59. Chance of precipitation is 50%.

    High: 59 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 41.

    Low: 41 °F

    Clear

Detailed Forecast

Tonight
Showers and thunderstorms before 4am, then a chance of showers. Low around 61. Southwest wind 8 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Thursday
A 20 percent chance of showers and thunderstorms after 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 82. West wind 6 to 9 mph.
Thursday Night
Mostly clear, with a low around 58. South wind 3 to 5 mph.
Friday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. South wind 5 to 14 mph, with gusts as high as 24 mph.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 53. South wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a steady temperature around 59. Chance of precipitation is 50%.
Saturday Night
Mostly clear, with a low around 40.
Sunday
Sunny, with a high near 65.
Sunday Night
Clear, with a low around 41.
Monday
Sunny, with a high near 71.
Monday Night
Mostly clear, with a low around 51.
Tuesday
Sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 55.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 78.
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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:
6:56 pm CDT Apr 15, 2026
Forecast Valid:
7pm CDT Apr 15, 2026-6pm CDT Apr 22, 2026
 
Forecast Discussion
 
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Additional Resources

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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