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

48°F

9°C

Humidity 76%
Wind Speed W 6 mph
Barometer 30.12 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 22 Nov 4:45 pm CST
Extended Forecast for

Saint Jacob IL

  • Tonight

    Tonight: Partly cloudy, with a low around 42. West wind 3 to 6 mph.

    Low: 42 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 58. Northwest wind around 5 mph becoming calm in the morning.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 41. Southeast wind 3 to 6 mph.

    Low: 41 °F

    Partly Cloudy

  • Monday

    Monday: A 50 percent chance of rain after noon. Mostly cloudy, with a high near 57. Southeast wind 6 to 10 mph.

    High: 57 °F

    Mostly Cloudy
    then Chance
    Rain

  • Monday Night

    Monday Night: Rain, mainly before midnight. Low around 49. Southeast wind 5 to 9 mph. Chance of precipitation is 90%.

    Low: 49 °F

    Rain then
    Chance Rain

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 63.

    High: 63 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 26.

    Low: 26 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 42. West wind 3 to 6 mph.
Sunday
Sunny, with a high near 58. Northwest wind around 5 mph becoming calm in the morning.
Sunday Night
Partly cloudy, with a low around 41. Southeast wind 3 to 6 mph.
Monday
A 50 percent chance of rain after noon. Mostly cloudy, with a high near 57. Southeast wind 6 to 10 mph.
Monday Night
Rain, mainly before midnight. Low around 49. Southeast wind 5 to 9 mph. Chance of precipitation is 90%.
Tuesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 35.
Wednesday
Mostly sunny, with a high near 46.
Wednesday Night
Mostly clear, with a low around 26.
Thanksgiving Day
Sunny, with a high near 44.
Thursday Night
Partly cloudy, with a low around 25.
Friday
Mostly sunny, with a high near 45.
Friday Night
A slight chance of rain and snow. Partly cloudy, with a low around 28. Chance of precipitation is 20%.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 48.
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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:
4:46 pm CST Nov 22, 2025
Forecast Valid:
4pm CST Nov 22, 2025-6pm CST Nov 29, 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