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.

Fog/Mist

52°F

11°C

Humidity 100%
Wind Speed SE 6 mph
Barometer 30.04 in
Dewpoint 52°F (11°C)
Visibility 2.00 mi
Wind Chill50°F (10°C)
Last update 20 Nov 3:50 pm CST
Extended Forecast for

2 Miles WSW Alton IL

  • Tonight

    Tonight: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1am. Patchy fog after 2am. Low around 52. East wind 3 to 5 mph. Chance of precipitation is 100%.

    Low: 52 °F

    Chance Rain
    then Rain and
    Patchy Fog

  • Friday

    Friday: Rain. Patchy fog before 10am. High near 57. Northeast wind 6 to 9 mph. Chance of precipitation is 100%.

    High: 57 °F

    Rain and
    Patchy Fog
    then Rain
    Likely

  • Friday Night

    Friday Night: Rain, mainly before midnight. Low around 43. Northeast wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    Low: 43 °F

    Rain then
    Chance Rain

  • Saturday

    Saturday: Sunny, with a high near 58. North wind around 6 mph becoming light and variable in the afternoon.

    High: 58 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Monday

    Monday: Rain likely, mainly after noon. Mostly cloudy, with a high near 59. Chance of precipitation is 60%.

    High: 59 °F

    Rain Likely

  • Monday Night

    Monday Night: Rain, mainly before midnight. Low around 49. Chance of precipitation is 80%.

    Low: 49 °F

    Rain then
    Chance Rain

Detailed Forecast

Tonight
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1am. Patchy fog after 2am. Low around 52. East wind 3 to 5 mph. Chance of precipitation is 100%.
Friday
Rain. Patchy fog before 10am. High near 57. Northeast wind 6 to 9 mph. Chance of precipitation is 100%.
Friday Night
Rain, mainly before midnight. Low around 43. Northeast wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Saturday
Sunny, with a high near 58. North wind around 6 mph becoming light and variable in the afternoon.
Saturday Night
Mostly clear, with a low around 38. Calm wind.
Sunday
Sunny, with a high near 62.
Sunday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 43.
Monday
Rain likely, mainly after noon. Mostly cloudy, with a high near 59. Chance of precipitation is 60%.
Monday Night
Rain, mainly before midnight. Low around 49. Chance of precipitation is 80%.
Tuesday
A 20 percent chance of rain. Partly sunny, with a high near 62.
Tuesday Night
Partly cloudy, with a low around 37.
Wednesday
Mostly sunny, with a high near 48.
Wednesday Night
Partly cloudy, with a low around 30.
Thanksgiving Day
Mostly sunny, with a high near 45.
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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:
3:16 pm CST Nov 20, 2025
Forecast Valid:
4pm CST Nov 20, 2025-6pm CST Nov 27, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation