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.

Light Snow

25°F

-4°C

Humidity 93%
Wind Speed Calm
Barometer 30.09 in
Dewpoint 23°F (-5°C)
Visibility 1.00 mi
Last update 1 Dec 8:50 pm CST
Extended Forecast for

2 Miles W Saint Jacob IL

Winter Weather Advisory December 1, 09:16pm until December 2, 12:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory December 1, 09:16pm until December 2, 12:00am

    NOW until 12:00am Tue

    Winter Weather Advisory

  • Tonight

    Low: 18 °F

    Snow then
    Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 27. Northwest wind around 6 mph becoming light and variable in the afternoon.

    High: 27 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 19. Calm wind becoming south around 6 mph after midnight.

    Low: 19 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 38. South wind 6 to 8 mph becoming west in the afternoon.

    High: 38 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 13. North wind 6 to 11 mph.

    Low: 13 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 21.

    High: 21 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 8.

    Low: 8 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of snow before noon. Mostly sunny, with a high near 36.

    High: 36 °F

    Slight Chance
    Snow then
    Mostly Sunny

Detailed Forecast

Tonight
Snow, mainly before midnight. Low around 18. Northwest wind 3 to 8 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 1 to 3 inches possible.
Tuesday
Partly sunny, with a high near 27. Northwest wind around 6 mph becoming light and variable in the afternoon.
Tuesday Night
Partly cloudy, with a low around 19. Calm wind becoming south around 6 mph after midnight.
Wednesday
Partly sunny, with a high near 38. South wind 6 to 8 mph becoming west in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 13. North wind 6 to 11 mph.
Thursday
Mostly sunny, with a high near 21.
Thursday Night
Partly cloudy, with a low around 8.
Friday
A 20 percent chance of snow before noon. Mostly sunny, with a high near 36.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Partly sunny, with a high near 38.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
Mostly cloudy, with a high near 36.
Sunday Night
Mostly cloudy, with a low around 18.
Monday
Partly sunny, with a high near 36.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W Saint Jacob IL
 38.72°N 89.8°W (Elev. 449 ft)
Last Update:
9:06 pm CST Dec 1, 2025
Forecast Valid:
9pm CST Dec 1, 2025-6pm CST Dec 8, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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