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

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

51°F

11°C

Humidity 80%
Wind Speed Calm
Barometer 30.20 in (1022.8 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 9 Nov 8:52 am CST
Extended Forecast for

Jacob IL

  • Today

    Today: Sunny, with a high near 70. Calm wind becoming southwest around 5 mph.

    High: 70 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 41. Light south southwest wind.

    Low: 41 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 72. Calm wind becoming southwest around 5 mph.

    High: 72 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 42. Light south southwest wind.

    Low: 42 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Showers likely and possibly a thunderstorm after noon. Mostly sunny, with a high near 72. Light and variable wind becoming southwest 6 to 11 mph in the morning. Chance of precipitation is 60%.

    High: 72 °F

    Mostly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 40. North northwest wind 8 to 13 mph.

    Low: 40 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 53. North northwest wind 13 to 17 mph, with gusts as high as 23 mph.

    High: 53 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 31. North northwest wind 8 to 13 mph.

    Low: 31 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 48. North northwest wind 7 to 14 mph, with gusts as high as 20 mph.

    High: 48 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 70. Calm wind becoming southwest around 5 mph.
Tonight
Clear, with a low around 41. Light south southwest wind.
Tuesday
Sunny, with a high near 72. Calm wind becoming southwest around 5 mph.
Tuesday Night
Mostly clear, with a low around 42. Light south southwest wind.
Veterans Day
Showers likely and possibly a thunderstorm after noon. Mostly sunny, with a high near 72. Light and variable wind becoming southwest 6 to 11 mph in the morning. Chance of precipitation is 60%.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 40. North northwest wind 8 to 13 mph.
Thursday
Mostly sunny, with a high near 53. North northwest wind 13 to 17 mph, with gusts as high as 23 mph.
Thursday Night
Mostly cloudy, with a low around 31. North northwest wind 8 to 13 mph.
Friday
Mostly sunny, with a high near 48. North northwest wind 7 to 14 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 27. North northwest wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 53. Calm wind becoming northwest around 6 mph.
Saturday Night
Clear, with a low around 31. Calm wind.
Sunday
Sunny, with a high near 60. Calm wind becoming south southwest around 5 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Jacob IL
 37.75°N 89.54°W
Last Update:
8:41 am CST Nov 9, 2026
Forecast Valid:
9am CST Nov 9, 2026-6pm CST Nov 15, 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