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

40°F

4°C

Humidity 47%
Wind Speed E 8 mph
Barometer 29.81 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 26 Feb 2:55 am CST
Extended Forecast for

4 Miles SSW South Roxana IL

  • Overnight

    Overnight: A 20 percent chance of rain before 4am. Mostly cloudy, with a steady temperature around 39. Northeast wind 7 to 10 mph.

    Low: 39 °F

    Slight Chance
    Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 56. Southeast wind 5 to 8 mph becoming light and variable in the afternoon.

    High: 56 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 37. South wind 3 to 5 mph.

    Low: 37 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 73. Southwest wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 40. Southwest wind 5 to 8 mph becoming north after midnight.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before midnight. Partly cloudy, with a low around 30.

    Low: 30 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Sunday

    Sunday: Rain and snow likely, mainly after noon. Cloudy, with a high near 40. Chance of precipitation is 60%.

    High: 40 °F

    Chance
    Rain/Snow
    then
    Rain/Snow
    Likely

  • Sunday Night

    Sunday Night: Rain and snow likely, mainly before midnight. Cloudy, with a low around 27. Chance of precipitation is 70%.

    Low: 27 °F

    Rain/Snow
    Likely

Detailed Forecast

Overnight
A 20 percent chance of rain before 4am. Mostly cloudy, with a steady temperature around 39. Northeast wind 7 to 10 mph.
Thursday
Mostly sunny, with a high near 56. Southeast wind 5 to 8 mph becoming light and variable in the afternoon.
Thursday Night
Clear, with a low around 37. South wind 3 to 5 mph.
Friday
Sunny, with a high near 73. Southwest wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon.
Friday Night
Mostly clear, with a low around 40. Southwest wind 5 to 8 mph becoming north after midnight.
Saturday
Mostly sunny, with a high near 64.
Saturday Night
A 20 percent chance of rain before midnight. Partly cloudy, with a low around 30.
Sunday
Rain and snow likely, mainly after noon. Cloudy, with a high near 40. Chance of precipitation is 60%.
Sunday Night
Rain and snow likely, mainly before midnight. Cloudy, with a low around 27. Chance of precipitation is 70%.
Monday
A chance of rain and snow before noon, then a slight chance of rain. Cloudy, with a high near 41. Chance of precipitation is 30%.
Monday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 26.
Tuesday
A 40 percent chance of rain. Cloudy, with a high near 43.
Tuesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 31.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 51.
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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:
1:51 am CST Feb 26, 2026
Forecast Valid:
3am CST Feb 26, 2026-6pm CST Mar 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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