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.

Fog/Mist

36°F

2°C

Humidity 87%
Wind Speed N 16 mph
Barometer 30.10 in
Dewpoint 32°F (0°C)
Visibility 4.00 mi
Wind Chill26°F (-3°C)
Last update 7 Dec 12:50 pm CST
Extended Forecast for

Saint Jacob IL

  • This Afternoon

    This Afternoon: A slight chance of drizzle. Cloudy, with a high near 42. North wind 11 to 14 mph.

    High: 42 °F

    Slight Chance
    Drizzle

  • Tonight

    Tonight: A 20 percent chance of snow before 10pm. Mostly cloudy, with a low around 22. North wind 6 to 13 mph.

    Low: 22 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 34. North wind around 6 mph becoming calm in the morning.

    High: 34 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a steady temperature around 29. Light south wind increasing to 5 to 10 mph in the evening.

    Low: 29 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 51. South wind 11 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 41.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Thursday

    Thursday: A chance of rain and snow. Mostly cloudy, with a high near 37. Chance of precipitation is 30%.

    High: 37 °F

    Chance
    Rain/Snow

Detailed Forecast

This Afternoon
A slight chance of drizzle. Cloudy, with a high near 42. North wind 11 to 14 mph.
Tonight
A 20 percent chance of snow before 10pm. Mostly cloudy, with a low around 22. North wind 6 to 13 mph.
Monday
Mostly sunny, with a high near 34. North wind around 6 mph becoming calm in the morning.
Monday Night
Partly cloudy, with a steady temperature around 29. Light south wind increasing to 5 to 10 mph in the evening.
Tuesday
Mostly sunny, with a high near 51. South wind 11 to 14 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly cloudy, with a low around 41.
Wednesday
Partly sunny, with a high near 48.
Wednesday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 27.
Thursday
A chance of rain and snow. Mostly cloudy, with a high near 37. Chance of precipitation is 30%.
Thursday Night
A slight chance of rain and snow before midnight. Mostly cloudy, with a low around 17. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 24.
Friday Night
Mostly cloudy, with a low around 6.
Saturday
Partly sunny, with a high near 21.
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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:
11:06 am CST Dec 7, 2025
Forecast Valid:
1pm CST Dec 7, 2025-6pm CST Dec 13, 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