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

23°F

-5°C

Humidity 74%
Wind Speed N 3 mph
Barometer 30.33 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Last update 8 Dec 4:55 am CST
Extended Forecast for

Saint Jacob IL

  • Today

    Today: Cloudy through mid morning, then gradual clearing, with a high near 34. North wind 5 to 7 mph becoming calm in the afternoon.

    High: 34 °F

    Gradual
    Clearing

  • Tonight

    Tonight: Increasing clouds, with a low around 24. Light southeast wind becoming south 6 to 11 mph in the evening.

    Low: 24 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 51. Southwest wind 10 to 14 mph, with gusts as high as 21 mph.

    High: 51 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 43. South wind 14 to 16 mph becoming west after midnight. Winds could gust as high as 29 mph.

    Low: 43 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a temperature falling to around 37 by 5pm. Breezy, with a northwest wind 13 to 22 mph, with gusts as high as 29 mph.

    High: 47 °F⇓

    Partly Sunny
    and Breezy

  • Wednesday Night

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

    Low: 26 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 37.

    High: 37 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

Detailed Forecast

Today
Cloudy through mid morning, then gradual clearing, with a high near 34. North wind 5 to 7 mph becoming calm in the afternoon.
Tonight
Increasing clouds, with a low around 24. Light southeast wind becoming south 6 to 11 mph in the evening.
Tuesday
Mostly sunny, with a high near 51. Southwest wind 10 to 14 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly cloudy, with a low around 43. South wind 14 to 16 mph becoming west after midnight. Winds could gust as high as 29 mph.
Wednesday
Partly sunny, with a temperature falling to around 37 by 5pm. Breezy, with a northwest wind 13 to 22 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly cloudy, with a low around 26.
Thursday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 37.
Thursday Night
Mostly cloudy, with a low around 21.
Friday
Partly sunny, with a high near 32.
Friday Night
Mostly cloudy, with a low around 8.
Saturday
Partly sunny and cold, with a high near 19.
Saturday Night
Mostly cloudy, with a low around 9.
Sunday
Mostly sunny, with a high near 27.
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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:
4:01 am CST Dec 8, 2025
Forecast Valid:
5am CST Dec 8, 2025-6pm CST Dec 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