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.

Mostly Cloudy

16°F

-9°C

Humidity 57%
Wind Speed W 13 mph
Barometer 30.29 in
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Wind Chill2°F (-17°C)
Last update 17 Jan 6:50 pm CST
Extended Forecast for

Saint Jacob IL

  • Tonight

    Tonight: A chance of flurries before 11pm. Mostly cloudy, then gradually becoming clear, with a low around 13. West wind 6 to 15 mph, with gusts as high as 22 mph.

    Low: 13 °F

    Chance
    Flurries

  • Sunday

    Sunday: A chance of flurries before 2pm, then a slight chance of snow between 2pm and 3pm, then a chance of flurries after 3pm. Increasing clouds, with a high near 32. South wind 6 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    High: 32 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: A chance of flurries before 9pm. Partly cloudy, with a low around 11. Blustery, with a southwest wind 11 to 21 mph becoming northwest after midnight. Winds could gust as high as 29 mph.

    Low: 11 °F

    Partly Cloudy
    then Mostly
    Clear and
    Blustery

  • M.L.King Day

    M.L.King Day: Sunny and cold, with a high near 20. Blustery, with a northwest wind 15 to 20 mph decreasing to 8 to 13 mph in the afternoon.

    High: 20 °F

    Sunny and
    Blustery then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 9. Northwest wind around 6 mph becoming light and variable in the evening.

    Low: 9 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 21.

    Low: 21 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of flurries before 11pm. Mostly cloudy, then gradually becoming clear, with a low around 13. West wind 6 to 15 mph, with gusts as high as 22 mph.
Sunday
A chance of flurries before 2pm, then a slight chance of snow between 2pm and 3pm, then a chance of flurries after 3pm. Increasing clouds, with a high near 32. South wind 6 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Sunday Night
A chance of flurries before 9pm. Partly cloudy, with a low around 11. Blustery, with a southwest wind 11 to 21 mph becoming northwest after midnight. Winds could gust as high as 29 mph.
M.L.King Day
Sunny and cold, with a high near 20. Blustery, with a northwest wind 15 to 20 mph decreasing to 8 to 13 mph in the afternoon.
Monday Night
Mostly clear, with a low around 9. Northwest wind around 6 mph becoming light and variable in the evening.
Tuesday
Mostly sunny, with a high near 36.
Tuesday Night
Partly cloudy, with a low around 27.
Wednesday
Mostly sunny, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 21.
Thursday
Sunny, with a high near 36.
Thursday Night
Partly cloudy, with a low around 23.
Friday
A 20 percent chance of rain. Mostly sunny, with a high near 42.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.
Saturday
A 40 percent chance of snow. Mostly cloudy, with a high near 31.
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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:
5:01 pm CST Jan 17, 2026
Forecast Valid:
7pm CST Jan 17, 2026-6pm CST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation