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

28°F

-2°C

Humidity 71%
Wind Speed S 7 mph
Barometer 30.38 in
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 12 Jan 1:35 am CST
Extended Forecast for

3 Miles S Donnellson IL

  • Overnight

    Overnight: Clear, with a low around 24. Calm wind becoming south 5 to 8 mph.

    Low: 24 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 48. Southwest wind 6 to 11 mph, with gusts as high as 22 mph.

    High: 48 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 34. South wind 6 to 8 mph.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 57. West wind 9 to 16 mph, with gusts as high as 26 mph.

    High: 57 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 36. West wind 8 to 10 mph.

    Low: 36 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain and snow after noon. Mostly cloudy, with a high near 42. Breezy. Chance of precipitation is 20%.

    High: 42 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 17.

    Low: 17 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 24. Calm wind becoming south 5 to 8 mph.
Monday
Sunny, with a high near 48. Southwest wind 6 to 11 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 34. South wind 6 to 8 mph.
Tuesday
Increasing clouds, with a high near 57. West wind 9 to 16 mph, with gusts as high as 26 mph.
Tuesday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 36. West wind 8 to 10 mph.
Wednesday
A slight chance of rain and snow after noon. Mostly cloudy, with a high near 42. Breezy. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 17.
Thursday
Mostly sunny, with a high near 31.
Thursday Night
Mostly cloudy, with a low around 25.
Friday
A 20 percent chance of snow after noon. Partly sunny, with a high near 39.
Friday Night
Mostly cloudy, with a low around 21.
Saturday
Mostly cloudy, with a high near 29.
Saturday Night
Partly cloudy, with a low around 12.
Sunday
Mostly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Donnellson IL
 38.97°N 89.48°W (Elev. 600 ft)
Last Update:
12:31 am CST Jan 12, 2026
Forecast Valid:
1am CST Jan 12, 2026-6pm CST Jan 18, 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