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

Donnellson IL

  • Tonight

    Tonight: Mostly clear, with a low around 21. South wind around 7 mph.

    Low: 21 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 41. South wind 7 to 11 mph.

    High: 41 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 31. South wind 5 to 9 mph becoming light west after midnight.

    Low: 31 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 47. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 47 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after midnight. Mostly cloudy, with a temperature rising to around 49 by 5am. South wind 7 to 15 mph, with gusts as high as 23 mph.

    Low: 39 °F⇑

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm before noon, then a chance of showers. Temperature rising to near 53 by 8am, then falling to around 41 during the remainder of the day. Chance of precipitation is 80%.

    High: 53 °F⇓

    Showers then
    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 34.

    High: 34 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 21. South wind around 7 mph.
Tuesday
Mostly sunny, with a high near 41. South wind 7 to 11 mph.
Tuesday Night
Mostly cloudy, with a low around 31. South wind 5 to 9 mph becoming light west after midnight.
Wednesday
Sunny, with a high near 47. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Wednesday Night
A 30 percent chance of showers after midnight. Mostly cloudy, with a temperature rising to around 49 by 5am. South wind 7 to 15 mph, with gusts as high as 23 mph.
Thursday
Showers and possibly a thunderstorm before noon, then a chance of showers. Temperature rising to near 53 by 8am, then falling to around 41 during the remainder of the day. Chance of precipitation is 80%.
Thursday Night
Partly cloudy, with a low around 17.
Friday
Sunny, with a high near 34.
Friday Night
Partly cloudy, with a low around 27.
Saturday
Partly sunny, with a high near 51.
Saturday Night
Mostly cloudy, with a low around 29.
Sunday
Mostly sunny, with a high near 45.
Sunday Night
Mostly cloudy, with a low around 32.
Monday
Partly sunny, with a high near 49.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Donnellson IL
 39.04°N 89.47°W (Elev. 610 ft)
Last Update:
4:51 pm CST Dec 15, 2025
Forecast Valid:
5pm 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