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

40°F

4°C

Humidity 60%
Wind Speed S 12 mph
Barometer 30.05 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 13 Jan 12:55 am CST
Extended Forecast for

3 Miles W Saint Jacob IL

  • Overnight

    Overnight: Mostly clear, with a low around 36. South wind 5 to 8 mph.

    Low: 36 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 62. West wind 8 to 15 mph, with gusts as high as 24 mph.

    High: 62 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain, mainly between 7pm and 11pm. Mostly cloudy, with a low around 36. West wind 8 to 13 mph, with gusts as high as 21 mph.

    Low: 36 °F

    Chance Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature rising to near 40 by 10am, then falling to around 32 during the remainder of the day. Breezy, with a northwest wind 14 to 24 mph, with gusts as high as 32 mph.

    High: 40 °F⇓

    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 17. North wind 9 to 18 mph.

    Low: 17 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of rain and snow after noon. Mostly cloudy, with a high near 43. Chance of precipitation is 20%.

    High: 43 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 19.

    Low: 19 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 36. South wind 5 to 8 mph.
Tuesday
Increasing clouds, with a high near 62. West wind 8 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
A 30 percent chance of rain, mainly between 7pm and 11pm. Mostly cloudy, with a low around 36. West wind 8 to 13 mph, with gusts as high as 21 mph.
Wednesday
Mostly cloudy, with a temperature rising to near 40 by 10am, then falling to around 32 during the remainder of the day. Breezy, with a northwest wind 14 to 24 mph, with gusts as high as 32 mph.
Wednesday Night
Partly cloudy, with a low around 17. North wind 9 to 18 mph.
Thursday
Mostly sunny, with a high near 31.
Thursday Night
Mostly cloudy, with a low around 24.
Friday
A slight chance of rain and snow after noon. Mostly cloudy, with a high near 43. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, with a low around 19.
Saturday
Mostly cloudy, with a high near 28.
Saturday Night
Partly cloudy, with a low around 10.
Sunday
Mostly sunny, with a high near 26.
Sunday Night
Partly cloudy, with a low around 13.
M.L.King Day
Mostly sunny, with a high near 34.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Saint Jacob IL
 38.72°N 89.83°W (Elev. 449 ft)
Last Update:
12:21 am CST Jan 13, 2026
Forecast Valid:
1am CST Jan 13, 2026-6pm CST Jan 19, 2026
 
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