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

58°F

14°C

Humidity 96%
Wind Speed Calm
Barometer 30.18 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 23 Jun 5:35 am CDT
Extended Forecast for

Royal Lakes IL

  • Today

    Today: Sunny, with a high near 79. Light northeast wind.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 59. Light east wind.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. Southwest wind 5 to 7 mph.

    High: 80 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.

    Low: 63 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 82. Light south wind. Chance of precipitation is 70%.

    High: 82 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 64. Chance of precipitation is 70%.

    Low: 64 °F

    Heavy Rain

  • Friday

    Friday: Showers and thunderstorms. High near 80. Chance of precipitation is 80%.

    High: 80 °F

    T-storms

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 86.

    High: 86 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 79. Light northeast wind.
Tonight
Partly cloudy, with a low around 59. Light east wind.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. Southwest wind 5 to 7 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 82. Light south wind. Chance of precipitation is 70%.
Thursday Night
Showers and thunderstorms likely. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 64. Chance of precipitation is 70%.
Friday
Showers and thunderstorms. High near 80. Chance of precipitation is 80%.
Friday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 86.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Sunday
Sunny, with a high near 92.
Sunday Night
Mostly clear, with a low around 73.
Monday
Sunny, with a high near 94.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Royal Lakes IL
 39.12°N 89.95°W (Elev. 659 ft)
Last Update:
5:26 am CDT Jun 23, 2026
Forecast Valid:
5am CDT Jun 23, 2026-6pm CDT Jun 29, 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