National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

54°F

12°C

Humidity 72%
Wind Speed E 5 mph
Barometer 29.89 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 21 Mar 6:45 am CDT
Extended Forecast for

Donnellson IL

  • Today

    Today: Sunny, with a high near 83. Light and variable wind becoming south 5 to 7 mph in the morning.

    High: 83 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 60. South wind 5 to 9 mph.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 83. Southwest wind 9 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.

    High: 83 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 35. Breezy, with a north wind 13 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    Low: 35 °F

    Slight Chance
    T-storms and
    Breezy then
    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 54. North wind 7 to 10 mph.

    High: 54 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers. Partly sunny, with a high near 68.

    High: 68 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 83. Light and variable wind becoming south 5 to 7 mph in the morning.
Tonight
Mostly clear, with a low around 60. South wind 5 to 9 mph.
Sunday
Increasing clouds, with a high near 83. Southwest wind 9 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.
Sunday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 35. Breezy, with a north wind 13 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 54. North wind 7 to 10 mph.
Monday Night
Mostly cloudy, with a low around 37.
Tuesday
Partly sunny, with a high near 59.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 42.
Wednesday
A 20 percent chance of showers. Partly sunny, with a high near 68.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 53.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 77.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 42.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 54.
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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:
4:16 am CDT Mar 21, 2026
Forecast Valid:
7am CDT Mar 21, 2026-6pm CDT Mar 27, 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