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

73°F

23°C

Humidity 65%
Wind Speed Calm
Barometer 30.02 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 19 Jun 8:50 pm CDT
Extended Forecast for

3 Miles SSE Brighton IL

  • Tonight

    Tonight: A 20 percent chance of showers after 3am. Mostly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 84. Calm wind becoming northeast around 5 mph.

    High: 84 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers, with thunderstorms also possible after 4am. Increasing clouds, with a low around 66. East wind 3 to 6 mph. Chance of precipitation is 40%.

    Low: 66 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm, then showers and thunderstorms after 7am. High near 80. Southeast wind 8 to 15 mph becoming south in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%.

    High: 80 °F

    T-storms

  • Sunday Night

    Sunday Night: Showers and thunderstorms, mainly before 1am. Low around 64. West wind 9 to 11 mph becoming northwest after midnight. Chance of precipitation is 90%.

    Low: 64 °F

    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 76.

    High: 76 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
A 20 percent chance of showers after 3am. Mostly cloudy, with a low around 65. Calm wind.
Saturday
A 20 percent chance of showers before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 84. Calm wind becoming northeast around 5 mph.
Saturday Night
A chance of showers, with thunderstorms also possible after 4am. Increasing clouds, with a low around 66. East wind 3 to 6 mph. Chance of precipitation is 40%.
Sunday
Showers likely and possibly a thunderstorm, then showers and thunderstorms after 7am. High near 80. Southeast wind 8 to 15 mph becoming south in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%.
Sunday Night
Showers and thunderstorms, mainly before 1am. Low around 64. West wind 9 to 11 mph becoming northwest after midnight. Chance of precipitation is 90%.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 60.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Brighton IL
 38.99°N 90.1°W (Elev. 591 ft)
Last Update:
8:16 pm CDT Jun 19, 2026
Forecast Valid:
9pm CDT Jun 19, 2026-6pm CDT Jun 26, 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