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

79°F

26°C

Humidity 47%
Wind Speed NE 17 mph
Barometer 30.25 in (1023.9 mb)
Dewpoint 57°F (14°C)
Visibility 8.00 mi
Heat Index80°F (27°C)
Last update 1 Aug 5:53 pm CDT
Extended Forecast for

Swansea IL

  • Tonight

    Tonight: Partly cloudy, with a low around 58. Northeast wind 7 to 10 mph.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 80. Northeast wind 7 to 10 mph.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 59. Northeast wind 3 to 6 mph.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 82. Northeast wind 3 to 7 mph.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 64. Northeast wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83.

    High: 83 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 58. Northeast wind 7 to 10 mph.
Saturday
Sunny, with a high near 80. Northeast wind 7 to 10 mph.
Saturday Night
Mostly clear, with a low around 59. Northeast wind 3 to 6 mph.
Sunday
Sunny, with a high near 82. Northeast wind 3 to 7 mph.
Sunday Night
Partly cloudy, with a low around 64. Northeast wind around 5 mph becoming calm in the evening.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83.
Monday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 68.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Mostly sunny, with a high near 87.
Wednesday Night
Mostly clear, with a low around 70.
Thursday
Sunny, with a high near 89.
Thursday Night
Mostly clear, with a low around 72.
Friday
Mostly sunny, with a high near 91.
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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:
5:41 pm CDT Aug 1, 2025
Forecast Valid:
6pm CDT Aug 1, 2025-6pm CDT Aug 8, 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