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

63°F

17°C

Humidity 92%
Wind Speed S 5 mph
Barometer 29.92 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 17 Apr 2:35 am CDT
Extended Forecast for

4 Miles SSW South Roxana IL

  • Overnight

    Overnight: Partly cloudy, with a low around 60. South wind around 5 mph.

    Low: 60 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 86. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Low around 49. South wind 11 to 16 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 100%.

    Low: 49 °F

    T-storms
    Likely then
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms. Cloudy through mid morning, then gradual clearing, with a high near 59. Northwest wind 16 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.

    High: 59 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39. Northwest wind 5 to 14 mph, with gusts as high as 21 mph.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 60. South wind around 5 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 86. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 26 mph.
Friday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Low around 49. South wind 11 to 16 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 100%.
Saturday
A chance of showers and thunderstorms. Cloudy through mid morning, then gradual clearing, with a high near 59. Northwest wind 16 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.
Saturday Night
Mostly clear, with a low around 39. Northwest wind 5 to 14 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 43.
Monday
Sunny, with a high near 71.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
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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:
2:36 am CDT Apr 17, 2026
Forecast Valid:
2am CDT Apr 17, 2026-6pm CDT Apr 23, 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