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

44°F

7°C

Humidity 77%
Wind Speed NA
Barometer 29.86 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 8 Nov 6:35 am CST
Extended Forecast for

Saint Jacob IL

  • Today

    Today: A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 66. Calm wind becoming south around 6 mph in the afternoon.

    High: 66 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tonight

    Tonight: A 40 percent chance of rain, mainly before 10pm. Cloudy during the early evening, then becoming partly cloudy, with a low around 35. Breezy, with a southeast wind 7 to 12 mph becoming northwest 15 to 20 mph in the evening. Winds could gust as high as 29 mph.

    Low: 35 °F

    Chance Rain
    then Mostly
    Cloudy and
    Breezy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 41. Breezy, with a northwest wind 18 to 22 mph, with gusts as high as 30 mph.

    High: 41 °F

    Decreasing
    Clouds and
    Breezy

  • Sunday Night

    Sunday Night: A chance of flurries before midnight. Partly cloudy, with a low around 25. Northwest wind 11 to 16 mph.

    Low: 25 °F

    Chance
    Flurries

  • Monday

    Monday: Sunny, with a high near 40. Northwest wind 10 to 17 mph.

    High: 40 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 54. Breezy.

    High: 54 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 66. Calm wind becoming south around 6 mph in the afternoon.
Tonight
A 40 percent chance of rain, mainly before 10pm. Cloudy during the early evening, then becoming partly cloudy, with a low around 35. Breezy, with a southeast wind 7 to 12 mph becoming northwest 15 to 20 mph in the evening. Winds could gust as high as 29 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 41. Breezy, with a northwest wind 18 to 22 mph, with gusts as high as 30 mph.
Sunday Night
A chance of flurries before midnight. Partly cloudy, with a low around 25. Northwest wind 11 to 16 mph.
Monday
Sunny, with a high near 40. Northwest wind 10 to 17 mph.
Monday Night
Partly cloudy, with a low around 25.
Veterans Day
Partly sunny, with a high near 54. Breezy.
Tuesday Night
Mostly clear, with a low around 40.
Wednesday
Sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 35.
Thursday
Sunny, with a high near 62.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Mostly sunny, with a high near 67.
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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:
5:26 am CST Nov 8, 2025
Forecast Valid:
7am CST Nov 8, 2025-6pm CST Nov 14, 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