National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

50°F

10°C

Humidity 92%
Wind Speed Calm
Barometer 30.02 in
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 29 Sep 4:55 am CDT
Extended Forecast for

Brighton IL

  • Today

    Today: Sunny, with a high near 83. Light southeast wind becoming south 5 to 9 mph in the morning.

    High: 83 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 63. South wind around 7 mph.

    Low: 63 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 89. South wind 7 to 10 mph.

    High: 89 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 69. South wind 8 to 11 mph.

    Low: 69 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers, mainly after 1pm. Mostly cloudy, with a high near 87. South wind 9 to 11 mph.

    High: 87 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 64. Chance of precipitation is 80%.

    Low: 64 °F

    Showers

  • Friday

    Friday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.

    High: 72 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 69.

    High: 69 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 83. Light southeast wind becoming south 5 to 9 mph in the morning.
Tonight
Increasing clouds, with a low around 63. South wind around 7 mph.
Wednesday
Partly sunny, with a high near 89. South wind 7 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 69. South wind 8 to 11 mph.
Thursday
A 40 percent chance of showers, mainly after 1pm. Mostly cloudy, with a high near 87. South wind 9 to 11 mph.
Thursday Night
Showers and possibly a thunderstorm. Low around 64. Chance of precipitation is 80%.
Friday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 55.
Saturday
A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 69.
Saturday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 56.
Sunday
Partly sunny, with a high near 70.
Sunday Night
Mostly clear, with a low around 50.
Monday
Sunny, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Brighton IL
 39.04°N 90.13°W (Elev. 650 ft)
Last Update:
1:26 am CDT Sep 29, 2026
Forecast Valid:
5am CDT Sep 29, 2026-6pm CDT Oct 5, 2026
 
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