Showers and Storms continue across the East; Heat, Critical Fire Weather, Drought, and Poor Air Quality continues in the West

A series of fronts will focus locally heavy showers and storms across portions of the central and eastern U.S. through the end of the workweek. Dangerous to extreme heat continues across the Southwest U.S., eventually spreading eastward over the weekend into early next week. Elevated fire weather conditions continue across the Great Basin, with degraded air quality lingering across the Northwest. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

70°F

21°C

Humidity 90%
Wind Speed S 3 mph
Barometer 30.03 in (1016.4 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 5 Aug 1:53 am CDT
Extended Forecast for

3 Miles WNW Swansea IL

  • Overnight

    Overnight: Clear, with a low around 69. Calm wind becoming south around 5 mph.

    Low: 69 °F

    Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 92. South wind 3 to 8 mph.

    High: 92 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly after 4am.  Cloudy, then gradually becoming partly cloudy, with a low around 72. Southwest wind around 6 mph becoming light and variable  in the evening.  Chance of precipitation is 60%.

    Low: 72 °F

    Scattered
    T-storms then
    T-storms
    Likely

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 1pm.  High near 85. Light and variable wind becoming southwest around 6 mph in the morning.  Chance of precipitation is 80%.

    High: 85 °F

    T-storms then
    Scattered
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, mainly after 1am.  Partly cloudy, with a low around 72. Light southeast wind.  Chance of precipitation is 70%.

    Low: 72 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 87.

    High: 87 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 69. Calm wind becoming south around 5 mph.
Wednesday
Mostly sunny, with a high near 92. South wind 3 to 8 mph.
Wednesday Night
Showers and thunderstorms likely, mainly after 4am. Cloudy, then gradually becoming partly cloudy, with a low around 72. Southwest wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 60%.
Thursday
Showers and thunderstorms, mainly before 1pm. High near 85. Light and variable wind becoming southwest around 6 mph in the morning. Chance of precipitation is 80%.
Thursday Night
Showers and thunderstorms likely, mainly after 1am. Partly cloudy, with a low around 72. Light southeast wind. Chance of precipitation is 70%.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Friday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Saturday
Mostly sunny, with a high near 90.
Saturday Night
Mostly clear, with a low around 73.
Sunday
Sunny, with a high near 93.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny, with a high near 95.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 76.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Swansea IL
 38.57°N 90.04°W (Elev. 486 ft)
2:01 am CDT Aug 5, 2026
2am CDT Aug 5, 2026-6pm CDT Aug 11, 2026
 
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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