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.

Partly Cloudy

77°F

25°C

Humidity 51%
Wind Speed SW 9 mph
Barometer 29.94 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 14 Nov 1:50 pm CST
Extended Forecast for

Saint Jacob IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 78. South wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 59. South wind around 10 mph.

    Low: 59 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 77. South wind 9 to 15 mph becoming west in the afternoon. Winds could gust as high as 23 mph.

    High: 77 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 43. North wind 6 to 9 mph.

    Low: 43 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 59. North wind 3 to 6 mph.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of rain after noon. Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny
    then Chance
    Rain

  • Monday Night

    Monday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 45. Chance of precipitation is 70%.

    Low: 45 °F

    Rain Likely

  • Tuesday

    Tuesday: A 20 percent chance of rain before noon. Partly sunny, with a high near 60.

    High: 60 °F

    Slight Chance
    Rain then
    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 78. South wind 9 to 11 mph, with gusts as high as 20 mph.
Tonight
Increasing clouds, with a low around 59. South wind around 10 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 77. South wind 9 to 15 mph becoming west in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
Mostly clear, with a low around 43. North wind 6 to 9 mph.
Sunday
Sunny, with a high near 59. North wind 3 to 6 mph.
Sunday Night
Mostly clear, with a low around 35.
Monday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 57.
Monday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 45. Chance of precipitation is 70%.
Tuesday
A 20 percent chance of rain before noon. Partly sunny, with a high near 60.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
A 20 percent chance of rain. Partly sunny, with a high near 57.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 45.
Thursday
Rain likely. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Jacob IL
 38.72°N 89.77°W (Elev. 499 ft)
Last Update:
2:21 pm CST Nov 14, 2025
Forecast Valid:
2pm CST Nov 14, 2025-6pm CST Nov 20, 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