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.

Fair

32°F

0°C

Humidity 70%
Wind Speed N 13 G 23 mph
Barometer 30.21 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 28 Feb 11:15 pm CST
Extended Forecast for

4 Miles SSW South Roxana IL

  • Tonight

    Tonight: Mostly clear, with a low around 29. North wind 9 to 13 mph, with gusts as high as 20 mph.

    Low: 29 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 48. Northeast wind 9 to 13 mph.

    High: 48 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Rain, snow, and sleet, becoming all rain after 3am. Low around 35. East wind around 10 mph. Chance of precipitation is 80%. New snow and sleet accumulation of less than a half inch possible.

    Low: 35 °F

    Wintry Mix

  • Monday

    Monday: A 50 percent chance of rain, mainly before noon. Cloudy, with a high near 44. East wind 9 to 11 mph.

    High: 44 °F

    Chance Rain
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain. Low around 40. Southeast wind 6 to 8 mph. Chance of precipitation is 80%.

    Low: 40 °F

    Rain

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm before 9am, then rain between 9am and noon, then rain likely and possibly a thunderstorm after noon. High near 64. Chance of precipitation is 90%.

    High: 64 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 54. Chance of precipitation is 80%.

    Low: 54 °F

    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 68. Chance of precipitation is 80%.

    High: 68 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.

    Low: 52 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 29. North wind 9 to 13 mph, with gusts as high as 20 mph.
Sunday
Increasing clouds, with a high near 48. Northeast wind 9 to 13 mph.
Sunday Night
Rain, snow, and sleet, becoming all rain after 3am. Low around 35. East wind around 10 mph. Chance of precipitation is 80%. New snow and sleet accumulation of less than a half inch possible.
Monday
A 50 percent chance of rain, mainly before noon. Cloudy, with a high near 44. East wind 9 to 11 mph.
Monday Night
Rain. Low around 40. Southeast wind 6 to 8 mph. Chance of precipitation is 80%.
Tuesday
Rain and possibly a thunderstorm before 9am, then rain between 9am and noon, then rain likely and possibly a thunderstorm after noon. High near 64. Chance of precipitation is 90%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 54. Chance of precipitation is 80%.
Wednesday
Rain and possibly a thunderstorm. High near 68. Chance of precipitation is 80%.
Wednesday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.
Thursday
Rain likely. Partly sunny, with a high near 71. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of rain and thunderstorms. Partly cloudy, with a low around 56.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
Friday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. Chance of precipitation is 70%.
Saturday
Rain likely. Mostly cloudy, with a high near 66. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW South Roxana IL
 38.77°N 90.08°W (Elev. 427 ft)
Last Update:
10:01 pm CST Feb 28, 2026
Forecast Valid:
11pm CST Feb 28, 2026-6pm CST Mar 7, 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