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

54°F

12°C

Humidity 47%
Wind Speed W 9 mph
Barometer 29.80 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 13 Jan 7:50 pm CST
Extended Forecast for

3 Miles WNW Alton IL

  • Tonight

    Tonight: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 37. West wind 8 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    Low: 37 °F

    Rain Likely
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: A chance of sprinkles and flurries before 8am, then a chance of flurries between 8am and 9am. Cloudy, then gradual clearing during the afternoon, with a temperature falling to around 30 by 5pm. Breezy, with a northwest wind 16 to 22 mph, with gusts as high as 32 mph.

    High: 38 °F⇓

    Breezy.
    Chance
    Sprinkles/Flurries
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 17. Northwest wind 8 to 14 mph, with gusts as high as 26 mph.

    Low: 17 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 33. Northwest wind 6 to 8 mph becoming south in the afternoon.

    High: 33 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 27. South wind 7 to 14 mph becoming west after midnight. Winds could gust as high as 22 mph.

    Low: 27 °F

    Chance Snow

  • Friday

    Friday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 19.

    Low: 19 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 25.

    High: 25 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 10.

    Low: 10 °F

    Partly Cloudy

Detailed Forecast

Tonight
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 37. West wind 8 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Wednesday
A chance of sprinkles and flurries before 8am, then a chance of flurries between 8am and 9am. Cloudy, then gradual clearing during the afternoon, with a temperature falling to around 30 by 5pm. Breezy, with a northwest wind 16 to 22 mph, with gusts as high as 32 mph.
Wednesday Night
Clear, with a low around 17. Northwest wind 8 to 14 mph, with gusts as high as 26 mph.
Thursday
Sunny, with a high near 33. Northwest wind 6 to 8 mph becoming south in the afternoon.
Thursday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 27. South wind 7 to 14 mph becoming west after midnight. Winds could gust as high as 22 mph.
Friday
Partly sunny, with a high near 43.
Friday Night
Mostly cloudy, with a low around 19.
Saturday
Partly sunny, with a high near 25.
Saturday Night
Partly cloudy, with a low around 10.
Sunday
Mostly sunny, with a high near 29.
Sunday Night
Partly cloudy, with a low around 16.
M.L.King Day
Sunny, with a high near 31.
Monday Night
Mostly clear, with a low around 11.
Tuesday
Mostly sunny, with a high near 30.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Alton IL
 38.93°N 90.19°W (Elev. 591 ft)
Last Update:
8:01 pm CST Jan 13, 2026
Forecast Valid:
8pm CST Jan 13, 2026-6pm CST Jan 20, 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