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.

A Few Clouds

79°F

26°C

Humidity 45%
Wind Speed Vrbl 3 mph
Barometer 30.04 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 19 Jun 11:50 am CDT
Extended Forecast for

2 Miles S Donnellson IL

  • Juneteenth

    Juneteenth: Sunny, with a high near 81. Northwest wind around 5 mph becoming calm.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Isolated showers after 4am. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 20%.

    Low: 63 °F

    Mostly Cloudy
    then Isolated
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 83. Calm wind.

    High: 83 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 64. Light and variable wind. Chance of precipitation is 30%.

    Low: 64 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers and thunderstorms, mainly after 7am. High near 81. South wind 7 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 100%.

    High: 81 °F

    T-storms

  • Sunday Night

    Sunday Night: Showers and thunderstorms. Low around 64. Chance of precipitation is 80%.

    Low: 64 °F

    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 76.

    High: 76 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

Juneteenth
Sunny, with a high near 81. Northwest wind around 5 mph becoming calm.
Tonight
Isolated showers after 4am. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 83. Calm wind.
Saturday Night
A chance of showers, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 64. Light and variable wind. Chance of precipitation is 30%.
Sunday
Showers and thunderstorms, mainly after 7am. High near 81. South wind 7 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 100%.
Sunday Night
Showers and thunderstorms. Low around 64. Chance of precipitation is 80%.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 60.
Wednesday
Sunny, with a high near 80.
Wednesday Night
Partly cloudy, with a low around 61.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Donnellson IL
 39°N 89.47°W (Elev. 600 ft)
Last Update:
10:36 am CDT Jun 19, 2026
Forecast Valid:
12pm CDT Jun 19, 2026-6pm CDT Jun 25, 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