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

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fog/Mist

74°F

23°C

Humidity 99%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 74°F (23°C)
Visibility 1.25 mi
Last update 30 Jul 6:35 am CDT
Extended Forecast for

Brighton IL

Heat Advisory July 30, 06:46am until July 30, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 30, 06:46am until July 30, 07:00pm

    NOW until 7:00pm Wed

    Heat Advisory

  • Today

    High: 93 °F

    Patchy Fog
    then Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 1am, then showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 70. Northeast wind around 6 mph. Chance of precipitation is 60%.

    Low: 70 °F

    T-storms
    Likely

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78. North wind 6 to 13 mph, with gusts as high as 20 mph.

    High: 78 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 62. North wind 10 to 13 mph.

    Low: 62 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 78. Northeast wind 10 to 13 mph, with gusts as high as 20 mph.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 93. Heat index values as high as 106. Calm wind becoming south around 5 mph in the afternoon.
Tonight
Showers and thunderstorms likely, mainly before 1am, then showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 70. Northeast wind around 6 mph. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78. North wind 6 to 13 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 62. North wind 10 to 13 mph.
Friday
Sunny, with a high near 78. Northeast wind 10 to 13 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 58.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 58.
Sunday
Sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 63.
Monday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Brighton IL
 39.04°N 90.13°W (Elev. 650 ft)
Last Update:
5:41 am CDT Jul 30, 2025
Forecast Valid:
6am CDT Jul 30, 2025-6pm CDT Aug 5, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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