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

42°F

6°C

Humidity 45%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Last update 28 Feb 4:55 am CST
Extended Forecast for

4 Miles SSW South Roxana IL

  • Today

    Today: A 30 percent chance of rain, mainly between 1pm and 5pm. Mostly sunny, with a high near 63. Light and variable wind becoming east 5 to 8 mph in the morning.

    High: 63 °F

    Mostly Sunny
    then Chance
    Rain

  • Tonight

    Tonight: A 20 percent chance of rain before 7pm. Partly cloudy, with a low around 29. Southeast wind 6 to 11 mph becoming north in the evening.

    Low: 29 °F

    Slight Chance
    Rain then
    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 45. Northeast wind around 11 mph.

    High: 45 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Snow likely. Cloudy, with a low around 31. Northeast wind around 10 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    Low: 31 °F

    Snow Likely

  • Monday

    Monday: A chance of rain and snow before 9am, then a chance of rain. Cloudy, with a high near 43. East wind around 11 mph. Chance of precipitation is 40%.

    High: 43 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain. Low around 37. Chance of precipitation is 80%.

    Low: 37 °F

    Rain

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm. High near 58. Chance of precipitation is 90%.

    High: 58 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 48. Chance of precipitation is 80%.

    Low: 48 °F

    Rain

  • Wednesday

    Wednesday: Rain likely and possibly a thunderstorm. Cloudy, with a high near 65. Chance of precipitation is 70%.

    High: 65 °F

    Rain Likely

Detailed Forecast

Today
A 30 percent chance of rain, mainly between 1pm and 5pm. Mostly sunny, with a high near 63. Light and variable wind becoming east 5 to 8 mph in the morning.
Tonight
A 20 percent chance of rain before 7pm. Partly cloudy, with a low around 29. Southeast wind 6 to 11 mph becoming north in the evening.
Sunday
Increasing clouds, with a high near 45. Northeast wind around 11 mph.
Sunday Night
Snow likely. Cloudy, with a low around 31. Northeast wind around 10 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Monday
A chance of rain and snow before 9am, then a chance of rain. Cloudy, with a high near 43. East wind around 11 mph. Chance of precipitation is 40%.
Monday Night
Rain. Low around 37. Chance of precipitation is 80%.
Tuesday
Rain and possibly a thunderstorm. High near 58. Chance of precipitation is 90%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 48. Chance of precipitation is 80%.
Wednesday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 65. Chance of precipitation is 70%.
Wednesday Night
Rain likely and possibly a thunderstorm before midnight, then a chance of rain. Mostly cloudy, with a low around 50. Chance of precipitation is 60%.
Thursday
A 50 percent chance of rain. Partly sunny, with a high near 68.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 54.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. 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:
3:57 am CST Feb 28, 2026
Forecast Valid:
5am CST Feb 28, 2026-6pm CST Mar 6, 2026
 
Forecast Discussion
 
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Additional Resources

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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