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

49°F

9°C

Humidity 78%
Wind Speed S 8 mph
Barometer 29.71 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 5 Jan 11:15 pm CST
Extended Forecast for

Wilsonville IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 45. South wind around 11 mph, with gusts as high as 20 mph.

    Low: 45 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 55. West wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 55 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 34. Northwest wind 3 to 8 mph.

    Low: 34 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 56. Calm wind becoming south 5 to 8 mph in the morning.

    High: 56 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 42. South wind around 8 mph.

    Low: 42 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain. High near 57. Chance of precipitation is 90%.

    High: 57 °F

    Rain Likely
    then Rain

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.

    Low: 52 °F

    Showers
    Likely then
    Chance Rain

  • Friday

    Friday: A 40 percent chance of rain, mainly after noon. Partly sunny, with a high near 59.

    High: 59 °F

    Chance Rain

  • Friday Night

    Friday Night: A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 45. South wind around 11 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 55. West wind 10 to 14 mph, with gusts as high as 22 mph.
Tuesday Night
Partly cloudy, with a low around 34. Northwest wind 3 to 8 mph.
Wednesday
Sunny, with a high near 56. Calm wind becoming south 5 to 8 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 42. South wind around 8 mph.
Thursday
Rain. High near 57. Chance of precipitation is 90%.
Thursday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.
Friday
A 40 percent chance of rain, mainly after noon. Partly sunny, with a high near 59.
Friday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 36.
Saturday
Partly sunny, with a high near 42.
Saturday Night
Mostly cloudy, with a low around 23.
Sunday
Mostly sunny, with a high near 34.
Sunday Night
Mostly clear, with a low around 23.
Monday
Sunny, with a high near 45.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Wilsonville IL
 39.07°N 89.87°W (Elev. 636 ft)
Last Update:
9:46 pm CST Jan 5, 2026
Forecast Valid:
11pm CST Jan 5, 2026-6pm CST Jan 12, 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