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

79°F

26°C

Humidity 74%
Wind Speed E 7 mph
Barometer 29.89 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 16 Jun 6:50 pm CDT
Extended Forecast for

2 Miles S Donnellson IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 68. Light southeast wind.

    Low: 68 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 87. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 87 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: A slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 71. South wind 5 to 7 mph. Chance of precipitation is 20%.

    Low: 71 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 84. Southwest wind 9 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    High: 84 °F

    Heavy Rain

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66. Southwest wind 6 to 11 mph.

    Low: 66 °F

    Chance
    T-storms

  • Juneteenth

    Juneteenth: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 68. Light southeast wind.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 87. Calm wind becoming southwest around 6 mph in the afternoon.
Tuesday Night
A slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 71. South wind 5 to 7 mph. Chance of precipitation is 20%.
Wednesday
Showers and thunderstorms likely, mainly between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 84. Southwest wind 9 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Wednesday Night
A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66. Southwest wind 6 to 11 mph.
Juneteenth
Sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 73.
Saturday
Sunny, with a high near 92.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Sunny, with a high near 92.
Sunday Night
Mostly clear, with a low around 73.
Monday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Donnellson IL
 39°N 89.47°W (Elev. 600 ft)
Last Update:
6:07 pm CDT Jun 16, 2025
Forecast Valid:
7pm CDT Jun 16, 2025-6pm CDT Jun 23, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation