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 E 7 mph
Barometer 29.90 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 21 Mar 10:45 am CDT
Extended Forecast for

4 Miles SSW South Roxana IL

  • Today

    Today: Sunny, with a high near 88. South wind around 7 mph.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 63. South wind around 8 mph, with gusts as high as 21 mph.

    Low: 63 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 89. South wind 9 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 89 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 38. Breezy, with a north wind 18 to 23 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 20%.

    Low: 38 °F

    Slight Chance
    T-storms and
    Breezy then
    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 58. North wind around 10 mph.

    High: 58 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 63.

    High: 63 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 72.

    High: 72 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 88. South wind around 7 mph.
Tonight
Mostly clear, with a low around 63. South wind around 8 mph, with gusts as high as 21 mph.
Sunday
Increasing clouds, with a high near 89. South wind 9 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 38. Breezy, with a north wind 18 to 23 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 58. North wind around 10 mph.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
Partly sunny, with a high near 63.
Tuesday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 44.
Wednesday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 72.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 56.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 82.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 46.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW South Roxana IL
 38.77°N 90.08°W (Elev. 427 ft)
Last Update:
9:41 am CDT Mar 21, 2026
Forecast Valid:
11am CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
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