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

54°F

12°C

Humidity 33%
Wind Speed SW 8 mph
Barometer 30.17 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 12 Jan 3:50 pm CST
Extended Forecast for

Wilsonville IL

  • Tonight

    Tonight: Cloudy during the early evening, then clearing, with a low around 34. South wind 6 to 9 mph.

    Low: 34 °F

    Clearing

  • Tuesday

    Tuesday: Increasing clouds, with a high near 57. West wind 9 to 16 mph, with gusts as high as 30 mph.

    High: 57 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain, mainly before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 33. West wind 9 to 14 mph, with gusts as high as 24 mph.

    Low: 33 °F

    Chance Rain
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature rising to near 39 by 11am, then falling to around 30 during the remainder of the day. Breezy, with a northwest wind 16 to 24 mph, with gusts as high as 33 mph.

    High: 39 °F⇓

    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 15. North wind 9 to 17 mph, with gusts as high as 25 mph.

    Low: 15 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 29.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 22.

    Low: 22 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 40.

    High: 40 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 16.

    Low: 16 °F

    Slight Chance
    Snow then
    Mostly Cloudy

Detailed Forecast

Tonight
Cloudy during the early evening, then clearing, with a low around 34. South wind 6 to 9 mph.
Tuesday
Increasing clouds, with a high near 57. West wind 9 to 16 mph, with gusts as high as 30 mph.
Tuesday Night
A 30 percent chance of rain, mainly before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 33. West wind 9 to 14 mph, with gusts as high as 24 mph.
Wednesday
Mostly cloudy, with a temperature rising to near 39 by 11am, then falling to around 30 during the remainder of the day. Breezy, with a northwest wind 16 to 24 mph, with gusts as high as 33 mph.
Wednesday Night
Mostly clear, with a low around 15. North wind 9 to 17 mph, with gusts as high as 25 mph.
Thursday
Mostly sunny, with a high near 29.
Thursday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 22.
Friday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 40.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 16.
Saturday
Mostly cloudy, with a high near 26.
Saturday Night
Mostly cloudy, with a low around 7.
Sunday
Mostly sunny, with a high near 23.
Sunday Night
Partly cloudy, with a low around 11.
M.L.King Day
Mostly sunny, with a high near 31.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Wilsonville IL
 39.05°N 89.84°W (Elev. 600 ft)
Last Update:
4:46 pm CST Jan 12, 2026
Forecast Valid:
4pm CST Jan 12, 2026-6pm CST Jan 19, 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