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 33%
Wind Speed S 10 mph
Barometer 30.03 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 14 May 3:50 pm CDT
Extended Forecast for

Donnellson IL

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 52. Southeast wind 6 to 8 mph.

    Low: 52 °F

    Mostly Clear
    then Chance
    T-storms

  • Friday

    Friday: Showers and thunderstorms likely before 11am, then a slight chance of showers between 11am and 4pm. Cloudy through mid morning, then gradual clearing, with a high near 76. South wind 10 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 76 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 63. South wind 7 to 10 mph.

    Low: 63 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. Southwest wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 81 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 63. South wind around 8 mph. Chance of precipitation is 30%.

    Low: 63 °F

    Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 86. Breezy.

    High: 86 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Breezy.

    High: 87 °F

    Breezy.
    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 52. Southeast wind 6 to 8 mph.
Friday
Showers and thunderstorms likely before 11am, then a slight chance of showers between 11am and 4pm. Cloudy through mid morning, then gradual clearing, with a high near 76. South wind 10 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 63. South wind 7 to 10 mph.
Saturday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. Southwest wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 63. South wind around 8 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 86. Breezy.
Sunday Night
Mostly clear, with a low around 67.
Monday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Breezy.
Monday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 61. Chance of precipitation is 70%.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 77.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 56.
Thursday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Donnellson IL
 39.04°N 89.5°W (Elev. 554 ft)
Last Update:
3:01 pm CDT May 14, 2026
Forecast Valid:
4pm CDT May 14, 2026-6pm CDT May 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