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.

Mostly Cloudy and Breezy

43°F

6°C

Humidity 42%
Wind Speed NW 24 G 33 mph
Barometer 30.17 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 26 Nov 10:45 am CST
Extended Forecast for

Saint Jacob IL

  • Today

    Today: Partly sunny, then gradually becoming sunny, with a high near 44. Breezy, with a west wind 17 to 24 mph, with gusts as high as 38 mph.

    High: 44 °F

    Becoming
    Sunny and
    Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 27. Northwest wind 8 to 15 mph, with gusts as high as 24 mph.

    Low: 27 °F

    Partly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Sunny, with a high near 42. Northwest wind 8 to 13 mph.

    High: 42 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 21. Northwest wind 5 to 7 mph becoming calm after midnight.

    Low: 21 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 38. Light and variable wind.

    High: 38 °F

    Sunny

  • Friday Night

    Friday Night: A 50 percent chance of snow after 3am. Cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday

    Saturday: Snow before 9am, then rain, possibly mixed with snow. High near 37. Chance of precipitation is 90%.

    High: 37 °F

    Rain/Snow

  • Saturday Night

    Saturday Night: Rain likely, mainly before midnight. Cloudy, with a low around 29. Chance of precipitation is 70%.

    Low: 29 °F

    Rain Likely
    then Chance
    Rain

  • Sunday

    Sunday: A chance of snow before noon, then a slight chance of rain. Mostly cloudy, with a high near 36. Chance of precipitation is 30%.

    High: 36 °F

    Chance Snow
    then Slight
    Chance Rain

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny, with a high near 44. Breezy, with a west wind 17 to 24 mph, with gusts as high as 38 mph.
Tonight
Partly cloudy, with a low around 27. Northwest wind 8 to 15 mph, with gusts as high as 24 mph.
Thanksgiving Day
Sunny, with a high near 42. Northwest wind 8 to 13 mph.
Thursday Night
Mostly clear, with a low around 21. Northwest wind 5 to 7 mph becoming calm after midnight.
Friday
Sunny, with a high near 38. Light and variable wind.
Friday Night
A 50 percent chance of snow after 3am. Cloudy, with a low around 28.
Saturday
Snow before 9am, then rain, possibly mixed with snow. High near 37. Chance of precipitation is 90%.
Saturday Night
Rain likely, mainly before midnight. Cloudy, with a low around 29. Chance of precipitation is 70%.
Sunday
A chance of snow before noon, then a slight chance of rain. Mostly cloudy, with a high near 36. Chance of precipitation is 30%.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 19.
Monday
A 20 percent chance of snow. Partly sunny, with a high near 30.
Monday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 17.
Tuesday
A 20 percent chance of snow. Mostly sunny, with a high near 33.
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:
10:21 am CST Nov 26, 2025
Forecast Valid:
11am CST Nov 26, 2025-6pm CST Dec 2, 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