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.

Light Rain

48°F

9°C

Humidity 87%
Wind Speed N 12 mph
Barometer 29.82 in
Dewpoint 45°F (7°C)
Visibility 8.00 mi
Wind Chill43°F (6°C)
Last update 5 May 5:50 pm CDT
Extended Forecast for

2 Miles WSW Alton IL

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 2am, then a slight chance of showers between 2am and 4am. Low around 45. North wind 5 to 10 mph becoming light after midnight. Chance of precipitation is 100%.

    Low: 45 °F

    Showers then
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers between 7am and 1pm. Partly sunny, with a high near 60. North wind 6 to 8 mph. Chance of precipitation is 20%.

    High: 60 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 42. North wind around 6 mph becoming calm in the evening.

    Low: 42 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy through mid morning, then becoming sunny, with a high near 66. Calm wind becoming west 5 to 8 mph in the morning.

    High: 66 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47. South wind 3 to 6 mph.

    Low: 47 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 74. Chance of precipitation is 30%.

    High: 74 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.

    Low: 52 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58.

    Low: 58 °F

    Chance
    Showers

Detailed Forecast

Tonight
Showers and possibly a thunderstorm before 2am, then a slight chance of showers between 2am and 4am. Low around 45. North wind 5 to 10 mph becoming light after midnight. Chance of precipitation is 100%.
Wednesday
A slight chance of showers between 7am and 1pm. Partly sunny, with a high near 60. North wind 6 to 8 mph. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 42. North wind around 6 mph becoming calm in the evening.
Thursday
Mostly cloudy through mid morning, then becoming sunny, with a high near 66. Calm wind becoming west 5 to 8 mph in the morning.
Thursday Night
Mostly clear, with a low around 47. South wind 3 to 6 mph.
Friday
A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 74. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.
Saturday
Sunny, with a high near 81.
Saturday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 74. Chance of precipitation is 50%.
Sunday Night
Partly cloudy, with a low around 49.
Monday
Sunny, with a high near 73.
Monday Night
Mostly clear, with a low around 51.
Tuesday
A 20 percent chance of showers. Sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Alton IL
 38.88°N 90.19°W (Elev. 407 ft)
Last Update:
3:36 pm CDT May 5, 2026
Forecast Valid:
6pm CDT May 5, 2026-6pm CDT May 12, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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