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

77°F

25°C

Humidity 47%
Wind Speed W 13 mph
Barometer 29.65 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 15 Nov 2:50 pm CST
Extended Forecast for

Saint Jacob IL

  • Tonight

    Tonight: Mostly clear, with a low around 42. North wind 7 to 11 mph, with gusts as high as 21 mph.

    Low: 42 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58. North wind 5 to 9 mph.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 32. Light and variable wind.

    Low: 32 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers after 3pm. Mostly sunny, with a high near 60. Light east wind becoming southeast 6 to 11 mph in the morning.

    High: 60 °F

    Sunny then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 46. Southeast wind around 10 mph. Chance of precipitation is 70%.

    Low: 46 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 71. Chance of precipitation is 30%.

    High: 71 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 63.

    High: 63 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.

    Low: 51 °F

    Chance Rain
    then Rain
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 42. North wind 7 to 11 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 58. North wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 32. Light and variable wind.
Monday
A 20 percent chance of showers after 3pm. Mostly sunny, with a high near 60. Light east wind becoming southeast 6 to 11 mph in the morning.
Monday Night
Showers likely, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 46. Southeast wind around 10 mph. Chance of precipitation is 70%.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 71. Chance of precipitation is 30%.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 47.
Wednesday
A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 63.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.
Thursday
Rain and possibly a thunderstorm. High near 65. Chance of precipitation is 80%.
Thursday Night
Rain and possibly a thunderstorm. Low around 52. Chance of precipitation is 80%.
Friday
Rain likely. Partly sunny, with a high near 63. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 42.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Jacob IL
 38.7°N 89.77°W (Elev. 509 ft)
Last Update:
3:16 pm CST Nov 15, 2025
Forecast Valid:
3pm CST Nov 15, 2025-6pm CST Nov 22, 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