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.

Mostly Cloudy

52°F

11°C

Humidity 41%
Wind Speed E 3 mph
Barometer 29.77 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 25 Feb 12:58 pm CST
Extended Forecast for

3 Miles NE Jacob IL

  • This Afternoon

    This Afternoon: Cloudy, with a high near 55. Calm wind becoming east northeast around 5 mph.

    High: 55 °F

    Cloudy

  • Tonight

    Tonight: A 50 percent chance of showers, mainly between 10pm and 5am. Mostly cloudy, with a low around 38. East northeast wind around 6 mph.

    Low: 38 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 57. Northeast wind around 6 mph becoming calm in the afternoon.

    High: 57 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 35. Calm wind.

    Low: 35 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 66. Light south southwest wind becoming southwest 5 to 10 mph in the morning.

    High: 66 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 42. South wind 5 to 8 mph becoming light and variable after midnight.

    Low: 42 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 68. Light and variable wind becoming south southwest 5 to 10 mph in the morning.

    High: 68 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35. South southeast wind around 10 mph becoming north northeast in the evening.

    Low: 35 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers after noon. Cloudy, with a high near 49. East northeast wind around 11 mph, with gusts as high as 18 mph.

    High: 49 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

This Afternoon
Cloudy, with a high near 55. Calm wind becoming east northeast around 5 mph.
Tonight
A 50 percent chance of showers, mainly between 10pm and 5am. Mostly cloudy, with a low around 38. East northeast wind around 6 mph.
Thursday
Mostly sunny, with a high near 57. Northeast wind around 6 mph becoming calm in the afternoon.
Thursday Night
Mostly clear, with a low around 35. Calm wind.
Friday
Sunny, with a high near 66. Light south southwest wind becoming southwest 5 to 10 mph in the morning.
Friday Night
Clear, with a low around 42. South wind 5 to 8 mph becoming light and variable after midnight.
Saturday
Sunny, with a high near 68. Light and variable wind becoming south southwest 5 to 10 mph in the morning.
Saturday Night
Partly cloudy, with a low around 35. South southeast wind around 10 mph becoming north northeast in the evening.
Sunday
A chance of showers after noon. Cloudy, with a high near 49. East northeast wind around 11 mph, with gusts as high as 18 mph.
Sunday Night
Rain showers likely before midnight, then rain likely, possibly mixed with snow showers. Cloudy, with a low around 32. Northeast wind around 9 mph.
Monday
A chance of rain and snow showers. Cloudy, with a high near 44. Northeast wind around 10 mph.
Monday Night
A chance of showers. Cloudy, with a low around 33. East northeast wind 6 to 8 mph.
Tuesday
A chance of showers. Cloudy, with a high near 50. East wind around 7 mph becoming west in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Jacob IL
 37.78°N 89.51°W
Last Update:
12:35 pm CST Feb 25, 2026
Forecast Valid:
1pm CST Feb 25, 2026-6pm CST Mar 3, 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