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

48°F

9°C

Humidity 62%
Wind Speed S 7 mph
Barometer 30.11 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 13 Nov 9:50 pm CST
Extended Forecast for

2 Miles SW Alton IL

  • Tonight

    Tonight: Partly cloudy, with a low around 47. Southeast wind 3 to 7 mph.

    Low: 47 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 77. Southwest wind 6 to 9 mph.

    High: 77 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 60. South wind around 7 mph.

    Low: 60 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 78. Southwest wind 8 to 14 mph becoming west in the afternoon. Winds could gust as high as 23 mph.

    High: 78 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 43. North wind 6 to 9 mph.

    Low: 43 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of rain after noon. Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.

    Low: 45 °F

    Rain Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 47. Southeast wind 3 to 7 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 77. Southwest wind 6 to 9 mph.
Friday Night
Partly cloudy, with a low around 60. South wind around 7 mph.
Saturday
Partly sunny, with a high near 78. Southwest wind 8 to 14 mph becoming west in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
Mostly clear, with a low around 43. North wind 6 to 9 mph.
Sunday
Sunny, with a high near 60.
Sunday Night
Mostly clear, with a low around 39.
Monday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 59.
Monday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.
Tuesday
A 20 percent chance of rain before noon. Partly sunny, with a high near 61.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 45.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 59.
Wednesday Night
Rain likely. Cloudy, with a low around 47. Chance of precipitation is 60%.
Thursday
Rain likely. Mostly cloudy, with a high near 60. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Alton IL
 38.88°N 90.16°W (Elev. 466 ft)
Last Update:
9:41 pm CST Nov 13, 2025
Forecast Valid:
10pm CST Nov 13, 2025-6pm CST Nov 20, 2025
 
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