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

37°F

3°C

Humidity 75%
Wind Speed N 10 mph
Barometer 30.37 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 27 Mar 8:50 am CDT
Extended Forecast for

2 Miles WSW Alton IL

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a high near 52. North wind 16 to 18 mph, with gusts as high as 26 mph.

    High: 52 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 30. North wind 5 to 13 mph, with gusts as high as 20 mph.

    Low: 30 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 56. Calm wind becoming south 5 to 9 mph in the morning.

    High: 56 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 41. South wind 7 to 9 mph.

    Low: 41 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 69. South wind 7 to 13 mph.

    High: 69 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 64.

    Low: 64 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 20 percent chance of rain. Partly sunny, with a high near 86.

    High: 86 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a high near 52. North wind 16 to 18 mph, with gusts as high as 26 mph.
Tonight
Mostly clear, with a low around 30. North wind 5 to 13 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 56. Calm wind becoming south 5 to 9 mph in the morning.
Saturday Night
Partly cloudy, with a low around 41. South wind 7 to 9 mph.
Sunday
Mostly cloudy, with a high near 69. South wind 7 to 13 mph.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Mostly sunny, with a high near 83.
Monday Night
A 20 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 64.
Tuesday
A 20 percent chance of rain. Partly sunny, with a high near 86.
Tuesday Night
A chance of rain, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Wednesday
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 76.
Wednesday Night
Rain and thunderstorms likely. Mostly cloudy, with a low around 54. Chance of precipitation is 70%.
Thursday
Rain and thunderstorms likely. Mostly cloudy, with a high near 67. Chance of precipitation is 60%.
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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:
7:36 am CDT Mar 27, 2026
Forecast Valid:
9am CDT Mar 27, 2026-6pm CDT Apr 2, 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