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

72°F

22°C

Humidity 47%
Wind Speed SW 6 mph
Barometer 29.97 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 12 May 8:50 pm CDT
Extended Forecast for

Donnellson IL

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, then gradual clearing toward daybreak, with a low around 55. Calm wind becoming northwest 5 to 8 mph after midnight.

    Low: 55 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 71. Northwest wind 9 to 15 mph.

    High: 71 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 45. North wind 5 to 7 mph becoming calm in the evening.

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 71. Calm wind becoming south around 5 mph in the afternoon.

    High: 71 °F

    Sunny

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm, mainly after 4am. Mostly cloudy, with a low around 53. Southeast wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 53 °F

    Mostly Cloudy
    then Showers
    Likely

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 81.

    High: 81 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 63.

    Low: 63 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.

    High: 85 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, then gradual clearing toward daybreak, with a low around 55. Calm wind becoming northwest 5 to 8 mph after midnight.
Wednesday
Sunny, with a high near 71. Northwest wind 9 to 15 mph.
Wednesday Night
Mostly clear, with a low around 45. North wind 5 to 7 mph becoming calm in the evening.
Thursday
Sunny, with a high near 71. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Showers likely and possibly a thunderstorm, mainly after 4am. Mostly cloudy, with a low around 53. Southeast wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Friday
A 50 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 81.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 63.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Saturday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Chance of precipitation is 30%.
Sunday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Monday
Showers and thunderstorms likely. Partly sunny, with a high near 87. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 81. Chance of precipitation is 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:
9:21 pm CDT May 12, 2026
Forecast Valid:
9pm CDT May 12, 2026-6pm CDT May 19, 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