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.

Overcast

68°F

20°C

Humidity 93%
Wind Speed Calm
Barometer 30.07 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 15 Oct 3:15 am CDT
Extended Forecast for

South Roxana IL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 66. Light east wind.

    Low: 66 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Patchy fog between 9am and 11am. High near 81. East wind 5 to 11 mph becoming southwest in the afternoon. Chance of precipitation is 80%.

    High: 81 °F

    Showers and
    Patchy Fog

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 1am, then scattered showers between 1am and 2am. Increasing clouds, with a low around 47. Southwest wind 10 to 16 mph becoming northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.

    Low: 47 °F

    Showers
    Likely

  • Friday

    Friday: Partly sunny, with a high near 57. Breezy, with a northwest wind 18 to 22 mph, with gusts as high as 30 mph.

    High: 57 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 38. North wind 9 to 17 mph, with gusts as high as 25 mph.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 37.

    Low: 37 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 66. Light east wind.
Thursday
Showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Patchy fog between 9am and 11am. High near 81. East wind 5 to 11 mph becoming southwest in the afternoon. Chance of precipitation is 80%.
Thursday Night
Showers and thunderstorms likely before 1am, then scattered showers between 1am and 2am. Increasing clouds, with a low around 47. Southwest wind 10 to 16 mph becoming northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.
Friday
Partly sunny, with a high near 57. Breezy, with a northwest wind 18 to 22 mph, with gusts as high as 30 mph.
Friday Night
Mostly cloudy, with a low around 38. North wind 9 to 17 mph, with gusts as high as 25 mph.
Saturday
Sunny, with a high near 61.
Saturday Night
Clear, with a low around 37.
Sunday
Sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 39.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 41.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Roxana IL
 38.81°N 90.05°W (Elev. 430 ft)
Last Update:
1:26 am CDT Oct 15, 2026
Forecast Valid:
3am CDT Oct 15, 2026-6pm CDT Oct 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