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.

Partly Cloudy

56°F

13°C

Humidity 80%
Wind Speed S 15 mph
Barometer 29.61 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 18 Feb 1:15 am CST
Extended Forecast for

4 Miles SSW South Roxana IL

  • Overnight

    Overnight: A 20 percent chance of rain before 3am. Partly cloudy, with a low around 52. South wind 14 to 16 mph, with gusts as high as 29 mph.

    Low: 52 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: Sunny, with a high near 72. Southwest wind 6 to 13 mph, with gusts as high as 21 mph.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 50. South wind 3 to 7 mph.

    Low: 50 °F

    Partly Cloudy

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly before 3pm. Partly sunny, with a high near 70. South wind 7 to 16 mph, with gusts as high as 29 mph.

    High: 70 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 36. West wind 11 to 18 mph, with gusts as high as 28 mph.

    Low: 36 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of snow. Partly sunny, with a high near 43.

    High: 43 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow before midnight. Partly cloudy, with a low around 24.

    Low: 24 °F

    Chance Snow
    then Mostly
    Clear

Detailed Forecast

Overnight
A 20 percent chance of rain before 3am. Partly cloudy, with a low around 52. South wind 14 to 16 mph, with gusts as high as 29 mph.
Wednesday
Sunny, with a high near 72. Southwest wind 6 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
Partly cloudy, with a low around 50. South wind 3 to 7 mph.
Thursday
A 50 percent chance of showers and thunderstorms, mainly before 3pm. Partly sunny, with a high near 70. South wind 7 to 16 mph, with gusts as high as 29 mph.
Thursday Night
Mostly clear, with a low around 36. West wind 11 to 18 mph, with gusts as high as 28 mph.
Friday
Sunny, with a high near 49.
Friday Night
Partly cloudy, with a low around 31.
Saturday
A 40 percent chance of snow. Partly sunny, with a high near 43.
Saturday Night
A 30 percent chance of snow before midnight. Partly cloudy, with a low around 24.
Sunday
Sunny, with a high near 38.
Sunday Night
Mostly clear, with a low around 19.
Monday
Sunny, with a high near 37.
Monday Night
Mostly clear, with a low around 20.
Tuesday
Mostly sunny, with a high near 46.
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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:
12:51 am CST Feb 18, 2026
Forecast Valid:
1am CST Feb 18, 2026-6pm CST Feb 24, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

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Chance of Precipitation