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.

A Few Clouds and Breezy

79°F

26°C

Humidity 58%
Wind Speed S 21 G 29 mph
Barometer 29.92 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 3 Apr 5:50 pm CDT
Extended Forecast for

Royal Lakes IL

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 56. South wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 90%.

    Low: 56 °F

    Chance
    T-storms then
    T-storms

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 11am, then a slight chance of showers between 11am and noon. Cloudy, with a temperature falling to around 53 by 1pm. Breezy, with a west wind 13 to 20 mph. Chance of precipitation is 70%.

    High: 59 °F⇓

    Showers
    Likely then
    Mostly Cloudy
    and Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 37. West wind 10 to 17 mph, with gusts as high as 25 mph.

    Low: 37 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 56. Northwest wind 10 to 14 mph, with gusts as high as 21 mph.

    High: 56 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 38. West wind around 7 mph.

    Low: 38 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Monday Night

    Monday Night: A slight chance of rain showers after 1am, mixing with snow after 4am. Mostly cloudy, with a low around 34. Chance of precipitation is 20%.

    Low: 34 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Tuesday

    Tuesday: Partly sunny, with a high near 52.

    High: 52 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 56. South wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 90%.
Saturday
Showers likely and possibly a thunderstorm before 11am, then a slight chance of showers between 11am and noon. Cloudy, with a temperature falling to around 53 by 1pm. Breezy, with a west wind 13 to 20 mph. Chance of precipitation is 70%.
Saturday Night
Mostly clear, with a low around 37. West wind 10 to 17 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 56. Northwest wind 10 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Clear, with a low around 38. West wind around 7 mph.
Monday
Sunny, with a high near 58.
Monday Night
A slight chance of rain showers after 1am, mixing with snow after 4am. Mostly cloudy, with a low around 34. Chance of precipitation is 20%.
Tuesday
Partly sunny, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Partly sunny, with a high near 69. Breezy.
Wednesday Night
Mostly clear, with a low around 51.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 72.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Royal Lakes IL
 39.12°N 89.95°W (Elev. 659 ft)
Last Update:
5:36 pm CDT Apr 3, 2026
Forecast Valid:
6pm CDT Apr 3, 2026-6pm CDT Apr 10, 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