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.

Overcast

81°F

27°C

Humidity 74%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 17 Jul 5:50 pm CDT
Extended Forecast for

4 Miles SSW South Roxana IL

  • Tonight

    Tonight: A chance of showers and thunderstorms. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 72. Northeast wind 3 to 6 mph. Chance of precipitation is 50%.

    Low: 72 °F

    Chance
    T-storms then
    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 10am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 87. Light and variable wind becoming southeast around 6 mph in the morning. Chance of precipitation is 50%.

    High: 87 °F

    Chance
    Showers and
    Patchy Fog
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. South wind 3 to 7 mph.

    Low: 73 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 92. Heat index values as high as 105. Southwest wind 5 to 7 mph.

    High: 92 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. South wind 3 to 6 mph.

    Low: 76 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94.

    High: 94 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 76.

    Low: 76 °F

    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.

    High: 94 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 77.

    Low: 77 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 72. Northeast wind 3 to 6 mph. Chance of precipitation is 50%.
Friday
A chance of showers, with thunderstorms also possible after 10am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 87. Light and variable wind becoming southeast around 6 mph in the morning. Chance of precipitation is 50%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. South wind 3 to 7 mph.
Saturday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 92. Heat index values as high as 105. Southwest wind 5 to 7 mph.
Saturday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. South wind 3 to 6 mph.
Sunday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 76.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Monday Night
Partly cloudy, with a low around 77.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Sunny and hot, with a high near 98.
Wednesday Night
Mostly clear, with a low around 78.
Thursday
Sunny and hot, with a high near 98.
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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:
5:52 pm CDT Jul 17, 2025
Forecast Valid:
6pm CDT Jul 17, 2025-6pm CDT Jul 24, 2025
 
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