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

37°F

3°C

Humidity 33%
Wind Speed S 3 mph
Barometer 30.11 in
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Last update 15 Dec 4:50 pm CST
Extended Forecast for

Edwardsville IL

  • Tonight

    Tonight: Mostly clear, with a low around 27. South wind around 7 mph.

    Low: 27 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 45. South wind 7 to 11 mph.

    High: 45 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34. South wind 5 to 9 mph becoming west after midnight.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 52. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 52 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a temperature falling to near 41 by 8pm, then rising to around 51 during the remainder of the night. South wind 8 to 15 mph, with gusts as high as 23 mph.

    Low: 41 °F⇑

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: Showers, mainly before noon. Temperature rising to near 55 by 8am, then falling to around 45 during the remainder of the day. Chance of precipitation is 80%.

    High: 55 °F⇓

    Showers then
    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 36.

    High: 36 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 27. South wind around 7 mph.
Tuesday
Mostly sunny, with a high near 45. South wind 7 to 11 mph.
Tuesday Night
Mostly cloudy, with a low around 34. South wind 5 to 9 mph becoming west after midnight.
Wednesday
Sunny, with a high near 52. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Wednesday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a temperature falling to near 41 by 8pm, then rising to around 51 during the remainder of the night. South wind 8 to 15 mph, with gusts as high as 23 mph.
Thursday
Showers, mainly before noon. Temperature rising to near 55 by 8am, then falling to around 45 during the remainder of the day. Chance of precipitation is 80%.
Thursday Night
Partly cloudy, with a low around 20.
Friday
Sunny, with a high near 36.
Friday Night
Partly cloudy, with a low around 31.
Saturday
Mostly sunny, with a high near 55.
Saturday Night
Mostly cloudy, with a low around 32.
Sunday
Mostly sunny, with a high near 47.
Sunday Night
Mostly cloudy, with a low around 35.
Monday
Partly sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Edwardsville IL
 38.79°N 89.97°W (Elev. 558 ft)
Last Update:
4:51 pm CST Dec 15, 2025
Forecast Valid:
4pm CST Dec 15, 2025-6pm CST Dec 22, 2025
 
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