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

34°F

1°C

Humidity 61%
Wind Speed E 7 mph
Barometer 30.33 in
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 28 Nov 10:35 pm CST
Extended Forecast for

Saint Jacob IL

Winter Weather Advisory November 29, 12:00am until November 30, 12:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: Snow, mainly after 3am. Low around 29. Southeast wind 7 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. Total nighttime snow accumulation of less than one inch possible.

    Low: 29 °F

    Slight Chance
    Snow then
    Snow

  • Saturday

    Saturday: Rain, snow, and sleet before 2pm, then rain, possibly mixed with snow between 2pm and 5pm, then rain likely after 5pm. The snow could be heavy at times. High near 37. Southeast wind 13 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 2 to 4 inches possible.

    High: 37 °F

    Wintry Mix

  • Saturday Night

    Saturday Night: Rain likely before 11pm, then a chance of snow between 11pm and midnight. Cloudy, with a low around 25. Breezy, with a south wind 17 to 20 mph becoming west after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 25 °F

    Breezy.
    Rain/Snow
    Likely then
    Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 29. Northwest wind 11 to 18 mph, with gusts as high as 25 mph.

    High: 29 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 18. Northwest wind 5 to 9 mph becoming light and variable after midnight.

    Low: 18 °F

    Mostly Cloudy

  • Monday

    Monday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 30.

    High: 30 °F

    Mostly Cloudy
    then Chance
    Snow

  • Monday Night

    Monday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 19.

    Low: 19 °F

    Chance Snow

  • Tuesday

    Tuesday: Partly sunny, with a high near 30.

    High: 30 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

Detailed Forecast

Tonight
Snow, mainly after 3am. Low around 29. Southeast wind 7 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. Total nighttime snow accumulation of less than one inch possible.
Saturday
Rain, snow, and sleet before 2pm, then rain, possibly mixed with snow between 2pm and 5pm, then rain likely after 5pm. The snow could be heavy at times. High near 37. Southeast wind 13 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 2 to 4 inches possible.
Saturday Night
Rain likely before 11pm, then a chance of snow between 11pm and midnight. Cloudy, with a low around 25. Breezy, with a south wind 17 to 20 mph becoming west after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Sunday
Mostly cloudy, with a high near 29. Northwest wind 11 to 18 mph, with gusts as high as 25 mph.
Sunday Night
Mostly cloudy, with a low around 18. Northwest wind 5 to 9 mph becoming light and variable after midnight.
Monday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 30.
Monday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 19.
Tuesday
Partly sunny, with a high near 30.
Tuesday Night
Partly cloudy, with a low around 17.
Wednesday
Mostly sunny, with a high near 38.
Wednesday Night
Mostly cloudy, with a low around 19.
Thursday
Partly sunny, with a high near 30.
Thursday Night
Mostly cloudy, with a low around 18.
Friday
Partly sunny, with a high near 38.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Jacob IL
 38.72°N 89.77°W (Elev. 499 ft)
Last Update:
10:06 pm CST Nov 28, 2025
Forecast Valid:
10pm CST Nov 28, 2025-6pm CST Dec 5, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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