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

75°F

24°C

Humidity 61%
Wind Speed Vrbl 3 mph
Barometer 30.06 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 19 Jun 9:50 am CDT
Extended Forecast for

4 Miles NNW Royal Lakes IL

  • Juneteenth

    Juneteenth: Sunny, with a high near 81. Light northwest wind.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Isolated showers after 2am. Mostly cloudy, with a low around 62. Calm wind. Chance of precipitation is 20%.

    Low: 62 °F

    Mostly Cloudy
    then Isolated
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 83. Light and variable wind.

    High: 83 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers, with thunderstorms also possible after 4am. Increasing clouds, with a low around 63. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 50%.

    Low: 63 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm, then showers and thunderstorms after 7am. High near 80. Southeast wind 9 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 100%.

    High: 80 °F

    T-storms

  • Sunday Night

    Sunday Night: Showers and thunderstorms, mainly before 1am. Low around 62. Chance of precipitation is 80%.

    Low: 62 °F

    T-storms

  • Monday

    Monday: Partly sunny, with a high near 75.

    High: 75 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

Juneteenth
Sunny, with a high near 81. Light northwest wind.
Tonight
Isolated showers after 2am. Mostly cloudy, with a low around 62. Calm wind. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 83. Light and variable wind.
Saturday Night
A chance of showers, with thunderstorms also possible after 4am. Increasing clouds, with a low around 63. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 50%.
Sunday
Showers likely and possibly a thunderstorm, then showers and thunderstorms after 7am. High near 80. Southeast wind 9 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 100%.
Sunday Night
Showers and thunderstorms, mainly before 1am. Low around 62. Chance of precipitation is 80%.
Monday
Partly sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 59.
Wednesday
Sunny, with a high near 80.
Wednesday Night
Partly cloudy, with a low around 59.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Royal Lakes IL
 39.17°N 89.98°W (Elev. 587 ft)
Last Update:
10:36 am CDT Jun 19, 2026
Forecast Valid:
10am CDT Jun 19, 2026-6pm CDT Jun 25, 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