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.

Mostly Cloudy

27°F

-3°C

Humidity 39%
Wind Speed SW 9 mph
Barometer 30.00 in
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 18 Jan 4:50 pm CST
Extended Forecast for

Bethalto 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: Cloudy during the early evening, then gradual clearing, with a low around 9. Blustery, with a southwest wind 11 to 20 mph becoming northwest after midnight. Winds could gust as high as 36 mph.

    Low: 9 °F

    Mostly Cloudy
    then Mostly
    Clear and
    Blustery

  • M.L.King Day

    M.L.King Day: Sunny and cold, with a high near 20. Northwest wind 9 to 17 mph, with gusts as high as 28 mph.

    High: 20 °F

    Cold

  • Monday Night

    Monday Night: Mostly clear, with a low around 12. West wind 3 to 7 mph.

    Low: 12 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 35. Southwest wind 5 to 10 mph.

    High: 35 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 26. Southeast wind 7 to 13 mph becoming southwest after midnight. Winds could gust as high as 21 mph.

    Low: 26 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 44.

    High: 44 °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 34.

    High: 34 °F

    Sunny

  • Thursday Night

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

    Low: 22 °F

    Partly Cloudy

Detailed Forecast

Tonight
Cloudy during the early evening, then gradual clearing, with a low around 9. Blustery, with a southwest wind 11 to 20 mph becoming northwest after midnight. Winds could gust as high as 36 mph.
M.L.King Day
Sunny and cold, with a high near 20. Northwest wind 9 to 17 mph, with gusts as high as 28 mph.
Monday Night
Mostly clear, with a low around 12. West wind 3 to 7 mph.
Tuesday
Mostly sunny, with a high near 35. Southwest wind 5 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 26. Southeast wind 7 to 13 mph becoming southwest after midnight. Winds could gust as high as 21 mph.
Wednesday
Mostly sunny, with a high near 44.
Wednesday Night
Partly cloudy, with a low around 22.
Thursday
Sunny, with a high near 34.
Thursday Night
Partly cloudy, with a low around 22.
Friday
Mostly cloudy, with a high near 36.
Friday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 14.
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 19.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bethalto IL
 38.88°N 90.02°W (Elev. 499 ft)
Last Update:
3:16 pm CST Jan 18, 2026
Forecast Valid:
4pm CST Jan 18, 2026-6pm CST Jan 25, 2026
 
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