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

47°F

8°C

Humidity 53%
Wind Speed N 5 mph
Barometer 30.36 in
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 7 Apr 3:35 am CDT
Extended Forecast for

2 Miles WSW Alton IL

  • Overnight

    Overnight: Cloudy, with a low around 40. North wind around 10 mph, with gusts as high as 21 mph.

    Low: 40 °F

    Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 54. Northeast wind 10 to 13 mph, with gusts as high as 20 mph.

    High: 54 °F

    Chance Rain
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 40. Southeast wind 8 to 10 mph.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 74. South wind 9 to 16 mph, with gusts as high as 24 mph.

    High: 74 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 54. South wind 9 to 11 mph.

    Low: 54 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 72. Chance of precipitation is 60%.

    High: 72 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Cloudy, with a low around 40. North wind around 10 mph, with gusts as high as 21 mph.
Tuesday
A 30 percent chance of rain, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 54. Northeast wind 10 to 13 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 40. Southeast wind 8 to 10 mph.
Wednesday
Partly sunny, with a high near 74. South wind 9 to 16 mph, with gusts as high as 24 mph.
Wednesday Night
Mostly clear, with a low around 54. South wind 9 to 11 mph.
Thursday
Sunny, with a high near 78.
Thursday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 58.
Friday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 72. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 75. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 60.
Sunday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Monday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
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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:
3:31 am CDT Apr 7, 2026
Forecast Valid:
3am CDT Apr 7, 2026-6pm CDT Apr 13, 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