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.

Mostly Cloudy

48°F

9°C

Humidity 69%
Wind Speed E 6 mph
Barometer 29.87 in
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 18 Nov 2:55 am CST
Extended Forecast for

Saint Jacob IL

  • Overnight

    Overnight: A 40 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 49. Southeast wind around 10 mph.

    Low: 49 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of rain and thunderstorms, mainly before 7am. Mostly cloudy, with a high near 69. Southeast wind 6 to 10 mph becoming north in the afternoon.

    High: 69 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 45. North wind 3 to 6 mph.

    Low: 45 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 60. Light and variable wind.

    High: 60 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 47. Light and variable wind.

    Low: 47 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: Rain likely. Cloudy, with a high near 61. Chance of precipitation is 70%.

    High: 61 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm. Cloudy, with a low around 50. Chance of precipitation is 70%.

    Low: 50 °F

    Rain Likely

  • Friday

    Friday: Rain. High near 58. Chance of precipitation is 80%.

    High: 58 °F

    Rain

  • Friday Night

    Friday Night: A 50 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance Rain
    then Slight
    Chance Rain

Detailed Forecast

Overnight
A 40 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 49. Southeast wind around 10 mph.
Tuesday
A 30 percent chance of rain and thunderstorms, mainly before 7am. Mostly cloudy, with a high near 69. Southeast wind 6 to 10 mph becoming north in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 45. North wind 3 to 6 mph.
Wednesday
Mostly cloudy, with a high near 60. Light and variable wind.
Wednesday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 47. Light and variable wind.
Thursday
Rain likely. Cloudy, with a high near 61. Chance of precipitation is 70%.
Thursday Night
Rain likely and possibly a thunderstorm. Cloudy, with a low around 50. Chance of precipitation is 70%.
Friday
Rain. High near 58. Chance of precipitation is 80%.
Friday Night
A 50 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 41.
Saturday
Mostly sunny, with a high near 57.
Saturday Night
Mostly clear, with a low around 38.
Sunday
Sunny, with a high near 60.
Sunday Night
Partly cloudy, with a low around 41.
Monday
A 20 percent chance of rain. Partly sunny, with a high near 61.
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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:
2:11 am CST Nov 18, 2025
Forecast Valid:
3am CST Nov 18, 2025-6pm CST Nov 24, 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