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

59°F

15°C

Humidity 83%
Wind Speed S 3 mph
Barometer 29.89 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 16 Jun 2:55 am CDT
Extended Forecast for

5 Miles SSW Wilsonville IL

  • Overnight

    Overnight: Partly cloudy, with a low around 56. South wind 3 to 5 mph.

    Low: 56 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 79. West wind 6 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    High: 79 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 8pm. Mostly clear, with a low around 55. West wind 5 to 9 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 55 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms before 11am, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 89. Breezy, with a south wind 7 to 12 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    T-storms then
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 7pm, then showers and possibly a thunderstorm between 7pm and 1am. Low around 67. Breezy, with a west wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 80%.

    Low: 67 °F

    T-storms and
    Breezy

  • Thursday

    Thursday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 56. South wind 3 to 5 mph.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 79. West wind 6 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Tuesday Night
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 8pm. Mostly clear, with a low around 55. West wind 5 to 9 mph becoming calm in the evening. Chance of precipitation is 20%.
Wednesday
A slight chance of showers and thunderstorms before 11am, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 89. Breezy, with a south wind 7 to 12 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 20%.
Wednesday Night
A chance of showers and thunderstorms before 7pm, then showers and possibly a thunderstorm between 7pm and 1am. Low around 67. Breezy, with a west wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 80%.
Thursday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 58.
Juneteenth
Sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 60.
Saturday
Mostly sunny, with a high near 84.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Sunday
Showers and thunderstorms likely. Mostly cloudy, with a high near 84. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Chance of precipitation is 70%.
Monday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Wilsonville IL
 39.01°N 89.87°W (Elev. 600 ft)
Last Update:
1:26 am CDT Jun 16, 2026
Forecast Valid:
3am CDT Jun 16, 2026-6pm CDT Jun 22, 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