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

73°F

23°C

Humidity 83%
Wind Speed W 5 mph
Barometer 30.04 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 14 Oct 5:50 pm CDT
Extended Forecast for

Donnellson IL

  • Tonight

    Tonight: A slight chance of showers and thunderstorms, then a chance of showers after 4am. Mostly cloudy, with a low around 64. Light and variable wind. Chance of precipitation is 30%.

    Low: 64 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. High near 81. Light and variable wind becoming south 5 to 9 mph in the morning. Chance of precipitation is 80%.

    High: 81 °F

    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 47. Southwest wind 7 to 16 mph becoming northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 50%.

    Low: 47 °F

    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 56. Breezy, with a northwest wind 18 to 20 mph, with gusts as high as 30 mph.

    High: 56 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. North wind 8 to 15 mph.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 35.

    Low: 35 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms, then a chance of showers after 4am. Mostly cloudy, with a low around 64. Light and variable wind. Chance of precipitation is 30%.
Thursday
Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. High near 81. Light and variable wind becoming south 5 to 9 mph in the morning. Chance of precipitation is 80%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 47. Southwest wind 7 to 16 mph becoming northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 50%.
Friday
A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 56. Breezy, with a northwest wind 18 to 20 mph, with gusts as high as 30 mph.
Friday Night
Partly cloudy, with a low around 38. North wind 8 to 15 mph.
Saturday
Sunny, with a high near 61.
Saturday Night
Clear, with a low around 35.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 39.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Donnellson IL
 39.04°N 89.47°W (Elev. 610 ft)
Last Update:
5:36 pm CDT Oct 14, 2026
Forecast Valid:
6pm CDT Oct 14, 2026-6pm CDT Oct 21, 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