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.

Overcast

28°F

-2°C

Humidity 47%
Wind Speed SW 6 mph
Barometer 30.01 in
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 18 Jan 8:50 pm CST
Extended Forecast for

2 Miles WSW Alton IL

Cold Weather Advisory January 19, 03:00am until January 19, 10:00am
Click here for hazard details and duration
Cold Weather Advisory

  • Tonight

    Tonight: Partly cloudy, with a low around 10. Blustery, with a northwest wind 8 to 13 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 36 mph.

    Low: 10 °F

    Partly Cloudy
    then Partly
    Cloudy and
    Blustery

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 21. Northwest wind 9 to 18 mph, with gusts as high as 31 mph.

    High: 21 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 12. West wind around 5 mph becoming calm in the evening.

    Low: 12 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 36. Light southwest wind increasing to 5 to 9 mph in the morning.

    High: 36 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 28. Southeast wind 7 to 10 mph becoming southwest after midnight. Winds could gust as high as 20 mph.

    Low: 28 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 22.

    Low: 22 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 36.

    High: 36 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 22.

    Low: 22 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 10. Blustery, with a northwest wind 8 to 13 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 36 mph.
M.L.King Day
Sunny, with a high near 21. Northwest wind 9 to 18 mph, with gusts as high as 31 mph.
Monday Night
Mostly clear, with a low around 12. West wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 36. Light southwest wind increasing to 5 to 9 mph in the morning.
Tuesday Night
Mostly cloudy, with a low around 28. Southeast wind 7 to 10 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Wednesday
Mostly sunny, with a high near 45.
Wednesday Night
Partly cloudy, with a low around 22.
Thursday
Sunny, with a high near 36.
Thursday Night
Partly cloudy, with a low around 22.
Friday
Mostly cloudy, with a high near 38.
Friday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 15.
Saturday
A 30 percent chance of snow. Mostly cloudy, with a high near 24.
Saturday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 5.
Sunday
A 20 percent chance of snow. Mostly sunny and cold, with a high near 20.
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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:
9:11 pm CST Jan 18, 2026
Forecast Valid:
9pm CST Jan 18, 2026-6pm CST Jan 25, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation