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

85°F

29°C

Humidity 33%
Wind Speed SW 10 G 21 mph
Barometer 29.91 in (1012.5 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 7 Oct 2:52 pm CDT
Extended Forecast for

5 Miles NNE Jacob IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 86. West southwest wind around 6 mph.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 60. Light and variable wind.

    Low: 60 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 83. Light north northeast wind.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 58. Calm wind.

    Low: 58 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 86. Calm wind becoming south around 6 mph in the afternoon.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61. Light southeast wind.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 81. South southeast wind 3 to 8 mph.

    High: 81 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 58. East northeast wind 6 to 8 mph.

    Low: 58 °F

    Showers
    Likely

  • Sunday

    Sunday: Partly sunny, with a high near 76. Northeast wind 7 to 9 mph becoming northwest in the afternoon.

    High: 76 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 86. West southwest wind around 6 mph.
Tonight
Clear, with a low around 60. Light and variable wind.
Thursday
Sunny, with a high near 83. Light north northeast wind.
Thursday Night
Clear, with a low around 58. Calm wind.
Friday
Sunny, with a high near 86. Calm wind becoming south around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 61. Light southeast wind.
Saturday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 81. South southeast wind 3 to 8 mph.
Saturday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 58. East northeast wind 6 to 8 mph.
Sunday
Partly sunny, with a high near 76. Northeast wind 7 to 9 mph becoming northwest in the afternoon.
Sunday Night
Partly cloudy, with a low around 59. Calm wind.
Columbus Day
Mostly sunny, with a high near 85. Light southwest wind becoming south southwest 5 to 10 mph in the afternoon.
Monday Night
Mostly clear, with a low around 58. South southwest wind 6 to 8 mph.
Tuesday
Sunny, with a high near 74. Northwest wind 7 to 11 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NNE Jacob IL
 37.82°N 89.51°W
Last Update:
1:50 pm CDT Oct 7, 2026
Forecast Valid:
3pm CDT Oct 7, 2026-6pm CDT Oct 13, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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