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.

Fair

37°F

3°C

Humidity 45%
Wind Speed S 7 mph
Barometer 29.92 in
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 5 Dec 2:50 pm CST
Extended Forecast for

Saint Jacob IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 38. South wind 6 to 8 mph.

    High: 38 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 27. South wind 5 to 8 mph becoming west after midnight.

    Low: 27 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 39. West wind around 5 mph becoming calm in the morning.

    High: 39 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 29. Southeast wind around 6 mph.

    Low: 29 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: A chance of rain before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a high near 38. Southeast wind 6 to 14 mph becoming northwest in the morning. Chance of precipitation is 30%.

    High: 38 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 21.

    Low: 21 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 38. South wind 6 to 8 mph.
Tonight
Increasing clouds, with a low around 27. South wind 5 to 8 mph becoming west after midnight.
Saturday
Partly sunny, with a high near 39. West wind around 5 mph becoming calm in the morning.
Saturday Night
A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 29. Southeast wind around 6 mph.
Sunday
A chance of rain before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a high near 38. Southeast wind 6 to 14 mph becoming northwest in the morning. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 14.
Monday
Mostly sunny, with a high near 31.
Monday Night
Partly cloudy, with a low around 21.
Tuesday
Mostly sunny, with a high near 46.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 46.
Wednesday Night
Mostly cloudy, with a low around 20.
Thursday
Partly sunny, with a high near 32.
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:
1:56 pm CST Dec 5, 2025
Forecast Valid:
2pm CST Dec 5, 2025-6pm CST Dec 11, 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