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

27°F

-3°C

Humidity 89%
Wind Speed Calm
Barometer 30.39 in (1029.4 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 27 Nov 8:52 pm CST
Extended Forecast for

Jonesboro IL

  • Tonight

    Tonight: Clear, with a low around 25. Light northwest wind.

    Low: 25 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 41. Light and variable wind.

    High: 41 °F

    Sunny

  • Friday Night

    Friday Night: A 40 percent chance of snow, mainly after 3am. Increasing clouds, with a low around 30. Calm wind becoming southeast 5 to 7 mph after midnight.

    Low: 30 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday

    Saturday: Rain and snow, possibly mixed with sleet before noon, then rain, possibly mixed with snow between noon and 3pm, then rain after 3pm. High near 42. South southeast wind 7 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.

    High: 42 °F

    Wintry Mix

  • Saturday Night

    Saturday Night: Rain before 3am, then a chance of rain and snow. Low around 29. South wind 10 to 13 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%.

    Low: 29 °F

    Rain then
    Chance
    Rain/Snow

  • Sunday

    Sunday: Mostly cloudy, with a high near 33. Northwest wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 33 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 21. North northeast wind 6 to 8 mph.

    Low: 21 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 32. Northeast wind around 6 mph.

    High: 32 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A chance of snow. Mostly cloudy, with a low around 23. North northeast wind around 5 mph becoming calm.

    Low: 23 °F

    Chance Snow

Detailed Forecast

Tonight
Clear, with a low around 25. Light northwest wind.
Friday
Sunny, with a high near 41. Light and variable wind.
Friday Night
A 40 percent chance of snow, mainly after 3am. Increasing clouds, with a low around 30. Calm wind becoming southeast 5 to 7 mph after midnight.
Saturday
Rain and snow, possibly mixed with sleet before noon, then rain, possibly mixed with snow between noon and 3pm, then rain after 3pm. High near 42. South southeast wind 7 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.
Saturday Night
Rain before 3am, then a chance of rain and snow. Low around 29. South wind 10 to 13 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Sunday
Mostly cloudy, with a high near 33. Northwest wind 9 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 21. North northeast wind 6 to 8 mph.
Monday
Mostly cloudy, with a high near 32. Northeast wind around 6 mph.
Monday Night
A chance of snow. Mostly cloudy, with a low around 23. North northeast wind around 5 mph becoming calm.
Tuesday
A slight chance of snow before noon. Partly sunny, with a high near 33. North wind around 6 mph.
Tuesday Night
Partly cloudy, with a low around 21. Light and variable wind.
Wednesday
Mostly sunny, with a high near 39. South wind 3 to 7 mph.
Wednesday Night
Mostly cloudy, with a low around 26. Light and variable wind.
Thursday
Mostly cloudy, with a high near 40. Light and variable wind becoming northwest 5 to 7 mph in the morning.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Jonesboro IL
 37.46°N 89.27°W
Last Update:
7:11 pm CST Nov 27, 2025
Forecast Valid:
8pm CST Nov 27, 2025-6pm CST Dec 4, 2025
 
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