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 Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

67°F

19°C

Humidity 95%
Wind Speed E 3 mph
Barometer 30.01 in
Dewpoint 66°F (19°C)
Visibility 7.00 mi
Last update 4 Aug 3:35 am CDT
Extended Forecast for

Brighton IL

  • Overnight

    Overnight: Clear, with a low around 64. Light southeast wind.

    Low: 64 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87. Southeast wind 3 to 5 mph.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66. Southeast wind 3 to 6 mph.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. South wind 3 to 7 mph.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am.  Mostly cloudy, with a low around 68. Southeast wind 6 to 8 mph becoming southwest after midnight.  Chance of precipitation is 70%.

    Low: 68 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm.  Mostly cloudy, with a high near 84. Chance of precipitation is 70%.

    High: 84 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 66.

    Low: 66 °F

    Chance
    T-storms

  • Friday

    Friday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 66.

    Low: 66 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
Clear, with a low around 64. Light southeast wind.
Tuesday
Sunny, with a high near 87. Southeast wind 3 to 5 mph.
Tuesday Night
Mostly clear, with a low around 66. Southeast wind 3 to 6 mph.
Wednesday
Sunny, with a high near 88. South wind 3 to 7 mph.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 68. Southeast wind 6 to 8 mph becoming southwest after midnight. Chance of precipitation is 70%.
Thursday
Showers likely and possibly a thunderstorm before 1pm. Mostly cloudy, with a high near 84. Chance of precipitation is 70%.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 66.
Friday
Mostly sunny, with a high near 85.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 66.
Saturday
Mostly sunny, with a high near 87.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Sunny, with a high near 91.
Sunday Night
Mostly clear, with a low around 73.
Monday
Mostly sunny, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
Brighton IL
 39.04°N 90.16°W (Elev. 653 ft)
2:51 am CDT Aug 4, 2026
3am CDT Aug 4, 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