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.

Fair and Breezy

62°F

17°C

Humidity 52%
Wind Speed NW 21 G 31 mph
Barometer 29.79 in (1008.4 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 17 May 7:53 am CDT
Extended Forecast for

Swansea IL

  • Today

    Today: Sunny, with a high near 76. West wind 15 to 17 mph, with gusts as high as 28 mph.

    High: 76 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 57. Northwest wind 5 to 9 mph becoming calm in the evening.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 78. North wind 5 to 7 mph becoming southeast in the afternoon.

    High: 78 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 63. East wind around 6 mph. Chance of precipitation is 80%.

    Low: 63 °F

    Slight Chance
    T-storms then
    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. High near 79. East wind 8 to 10 mph. Chance of precipitation is 80%.

    High: 79 °F

    Showers then
    T-storms

  • Monday Night

    Monday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Low around 66. Chance of precipitation is 90%.

    Low: 66 °F

    T-storms

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 90%.

    High: 79 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.

    Low: 56 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 50 percent chance of showers. Mostly cloudy, with a high near 63.

    High: 63 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 76. West wind 15 to 17 mph, with gusts as high as 28 mph.
Tonight
Partly cloudy, with a low around 57. Northwest wind 5 to 9 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 78. North wind 5 to 7 mph becoming southeast in the afternoon.
Sunday Night
A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 63. East wind around 6 mph. Chance of precipitation is 80%.
Monday
Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. High near 79. East wind 8 to 10 mph. Chance of precipitation is 80%.
Monday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Low around 66. Chance of precipitation is 90%.
Tuesday
Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 90%.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.
Wednesday
A 50 percent chance of showers. Mostly cloudy, with a high near 63.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 49.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 68.
Thursday Night
Mostly clear, with a low around 50.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 72.
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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:
5:37 am CDT May 17, 2025
Forecast Valid:
8am CDT May 17, 2025-6pm CDT May 23, 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