Extreme Heat in the Southwest; Severe Weather in the Northern Plains; Heavy Rain in the East

Extreme heat continues across the Southwest as temperatures may top 120 degrees. The heat may expand across the West and south-central U.S. into the middle of the month. Severe thunderstorms capable of severe wind gusts and large hail will be the primary hazards today across the northern Plains into the upper Midwest. Rainfall could be locally heavy across the Eastern U.S. today. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

68°F

20°C

Humidity 96%
Wind Speed Calm
Barometer 29.98 in (1014.7 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 3 Aug 10:53 pm CDT
Extended Forecast for

Madison IL

  • Tonight

    Tonight: Patchy fog after 5am.  Otherwise, clear, with a low around 66. Calm wind.

    Low: 66 °F

    Patchy Fog

  • Tuesday

    Tuesday: Sunny, with a high near 90. Light southeast wind.

    High: 90 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 70. Southeast wind around 6 mph becoming calm  in the evening.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93. Calm wind becoming south around 6 mph in the morning.

    High: 93 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am.  Mostly cloudy, with a low around 72. Southeast wind 5 to 7 mph.  Chance of precipitation is 60%.

    Low: 72 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm.  Mostly cloudy, with a high near 86. Chance of precipitation is 70%.

    High: 86 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms.  Partly sunny, with a high near 87.

    High: 87 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 70. Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Patchy fog after 5am. Otherwise, clear, with a low around 66. Calm wind.
Tuesday
Sunny, with a high near 90. Light southeast wind.
Tuesday Night
Mostly clear, with a low around 70. Southeast wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 93. Calm wind becoming south around 6 mph in the morning.
Wednesday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 72. Southeast wind 5 to 7 mph. Chance of precipitation is 60%.
Thursday
Showers likely and possibly a thunderstorm before 1pm. Mostly cloudy, with a high near 86. Chance of precipitation is 70%.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 20%.
Saturday
A 20 percent chance of showers and thunderstorms. 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
Mostly sunny, with a high near 94.
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ABOUT THIS FORECAST

 
Point Forecast:
Madison IL
 38.68°N 90.14°W (Elev. 407 ft)
10:21 pm CDT Aug 3, 2026
11pm CDT Aug 3, 2026-6pm CDT Aug 10, 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