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.

A Few Clouds

34°F

1°C

Humidity 87%
Wind Speed W 6 mph
Barometer 29.99 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 6 Dec 8:50 am CST
Extended Forecast for

Brighton IL

  • Today

    Today: Partly sunny, with a high near 40. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 40 °F

    Partly Sunny

  • Tonight

    Tonight: A 30 percent chance of rain, mainly between 10pm and 1am. Cloudy, with a low around 31. Southeast wind around 8 mph.

    Low: 31 °F

    Chance Rain

  • Sunday

    Sunday: A slight chance of rain before 11am, then a slight chance of snow between 11am and noon. Mostly cloudy, with a temperature falling to around 27 by 5pm. South wind 6 to 14 mph becoming north in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

    High: 37 °F⇓

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 14. North wind 6 to 10 mph.

    Low: 14 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 30. North wind around 6 mph becoming light and variable.

    High: 30 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of rain before noon. Partly sunny, with a high near 42.

    High: 42 °F

    Slight Chance
    Rain then
    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 40. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Tonight
A 30 percent chance of rain, mainly between 10pm and 1am. Cloudy, with a low around 31. Southeast wind around 8 mph.
Sunday
A slight chance of rain before 11am, then a slight chance of snow between 11am and noon. Mostly cloudy, with a temperature falling to around 27 by 5pm. South wind 6 to 14 mph becoming north in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 14. North wind 6 to 10 mph.
Monday
Mostly sunny, with a high near 30. North wind around 6 mph becoming light and variable.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Mostly sunny, with a high near 45.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
A 20 percent chance of rain before noon. Partly sunny, with a high near 42.
Wednesday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 23.
Thursday
A chance of rain and snow. Mostly cloudy, with a high near 34. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 18.
Friday
Partly sunny, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Brighton IL
 39.04°N 90.13°W (Elev. 650 ft)
Last Update:
8:16 am CST Dec 6, 2025
Forecast Valid:
9am CST Dec 6, 2025-6pm CST Dec 12, 2025
 
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