National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fog/Mist

54°F

12°C

Humidity 88%
Wind Speed Vrbl 5 mph
Barometer 30.05 in
Dewpoint 50°F (10°C)
Visibility 5.00 mi
Wind Chill53°F (12°C)
Last update 20 Nov 12:50 pm CST
Extended Forecast for

Saint Jacob IL

  • This Afternoon

    This Afternoon: A 20 percent chance of rain before 3pm. Cloudy, with a high near 54. Southeast wind around 6 mph.

    High: 54 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: Rain likely, then rain and possibly a thunderstorm after 3am. Patchy fog after 11pm. Low around 52. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 100%.

    Low: 52 °F

    Chance Rain
    and Patchy
    Fog then Rain
    and Patchy
    Fog

  • Friday

    Friday: Rain and possibly a thunderstorm. Patchy fog before 10am. High near 57. East wind 5 to 8 mph. Chance of precipitation is 100%.

    High: 57 °F

    Rain and
    Patchy Fog
    then Rain
    Likely

  • Friday Night

    Friday Night: Rain, mainly before midnight. Low around 44. North wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    Low: 44 °F

    Rain then
    Chance Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 58. Northeast wind 3 to 6 mph.

    High: 58 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Monday

    Monday: A 50 percent chance of rain. Mostly cloudy, with a high near 59.

    High: 59 °F

    Chance Rain

Detailed Forecast

This Afternoon
A 20 percent chance of rain before 3pm. Cloudy, with a high near 54. Southeast wind around 6 mph.
Tonight
Rain likely, then rain and possibly a thunderstorm after 3am. Patchy fog after 11pm. Low around 52. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 100%.
Friday
Rain and possibly a thunderstorm. Patchy fog before 10am. High near 57. East wind 5 to 8 mph. Chance of precipitation is 100%.
Friday Night
Rain, mainly before midnight. Low around 44. North wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Saturday
Mostly sunny, with a high near 58. Northeast wind 3 to 6 mph.
Saturday Night
Mostly clear, with a low around 38.
Sunday
Mostly sunny, with a high near 62.
Sunday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 42.
Monday
A 50 percent chance of rain. Mostly cloudy, with a high near 59.
Monday Night
Rain likely. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.
Tuesday
A 40 percent chance of rain. Partly sunny, with a high near 60.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
Mostly sunny, with a high near 51.
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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:
10:56 am CST Nov 20, 2025
Forecast Valid:
12pm CST Nov 20, 2025-6pm CST Nov 26, 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