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

32°F

0°C

Humidity 69%
Wind Speed NW 8 mph
Barometer 30.05 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 10 Dec 8:50 pm CST
Extended Forecast for

Saint Jacob IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 24. Northwest wind 7 to 11 mph.

    Low: 24 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow after 4pm. Mostly cloudy, with a high near 34. Northwest wind 5 to 8 mph becoming south in the afternoon.

    High: 34 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Thursday Night

    Thursday Night: A chance of rain and snow before 11pm, then a slight chance of rain between 11pm and midnight. Mostly cloudy, with a low around 32. South wind 6 to 8 mph becoming northwest after midnight. Chance of precipitation is 30%.

    Low: 32 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Friday

    Friday: Partly sunny, with a high near 39. Northwest wind 7 to 13 mph.

    High: 39 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 21. Northwest wind 6 to 9 mph.

    Low: 21 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 27.

    High: 27 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 4.

    Low: 4 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny and cold, with a high near 17.

    High: 17 °F

    Cold

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 7.

    Low: 7 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 24. Northwest wind 7 to 11 mph.
Thursday
A 20 percent chance of snow after 4pm. Mostly cloudy, with a high near 34. Northwest wind 5 to 8 mph becoming south in the afternoon.
Thursday Night
A chance of rain and snow before 11pm, then a slight chance of rain between 11pm and midnight. Mostly cloudy, with a low around 32. South wind 6 to 8 mph becoming northwest after midnight. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 39. Northwest wind 7 to 13 mph.
Friday Night
Mostly cloudy, with a low around 21. Northwest wind 6 to 9 mph.
Saturday
A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 27.
Saturday Night
Mostly cloudy, with a low around 4.
Sunday
Sunny and cold, with a high near 17.
Sunday Night
Mostly clear, with a low around 7.
Monday
Sunny, with a high near 38.
Monday Night
Mostly cloudy, with a low around 24.
Tuesday
Partly sunny, with a high near 43.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
A 20 percent chance of rain. Mostly cloudy, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Jacob IL
 38.72°N 89.77°W (Elev. 499 ft)
Last Update:
8:01 pm CST Dec 10, 2025
Forecast Valid:
9pm CST Dec 10, 2025-6pm CST Dec 17, 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