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

57°F

14°C

Humidity 88%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 11 Oct 8:50 am CDT
Extended Forecast for

Donnellson IL

  • Today

    Today: Sunny, with a high near 86. Calm wind.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 60. Light south wind.

    Low: 60 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Partly sunny, then gradually becoming sunny, with a high near 92. Light southwest wind increasing to 6 to 11 mph in the morning.

    High: 92 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 68. Southwest wind 6 to 8 mph.

    Low: 68 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. West wind 6 to 9 mph.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 82. Chance of precipitation is 70%.

    High: 82 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.

    Low: 60 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.

    High: 77 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 86. Calm wind.
Tonight
Mostly clear, with a low around 60. Light south wind.
Columbus Day
Partly sunny, then gradually becoming sunny, with a high near 92. Light southwest wind increasing to 6 to 11 mph in the morning.
Monday Night
Clear, with a low around 68. Southwest wind 6 to 8 mph.
Tuesday
Sunny, with a high near 93. West wind 6 to 9 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 82. Chance of precipitation is 70%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Thursday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Friday
Partly sunny, with a high near 66.
Friday Night
Partly cloudy, with a low around 39.
Saturday
Mostly sunny, with a high near 60.
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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:
9:01 am CDT Oct 11, 2026
Forecast Valid:
9am CDT Oct 11, 2026-6pm CDT Oct 17, 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