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

62°F

17°C

Humidity 93%
Wind Speed N 5 mph
Barometer 30.10 in (1019.0 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 22 Jun 10:52 pm CDT
Extended Forecast for

Jonesboro IL

  • Tonight

    Tonight: Mostly clear, with a low around 62. Light north northwest wind.

    Low: 62 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82. North northeast wind 3 to 5 mph.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 84. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 30%.

    High: 84 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 86. Light south wind.

    High: 86 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 69. Light south wind. Chance of precipitation is 60%.

    Low: 69 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 85. South southwest wind 3 to 7 mph.

    High: 85 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 72. South southwest wind around 6 mph.

    Low: 72 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 62. Light north northwest wind.
Tuesday
Sunny, with a high near 82. North northeast wind 3 to 5 mph.
Tuesday Night
Mostly clear, with a low around 64. Calm wind.
Wednesday
A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 84. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 40%.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 86. Light south wind.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 69. Light south wind. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 85. South southwest wind 3 to 7 mph.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 72. South southwest wind around 6 mph.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 88. Southwest wind 7 to 10 mph.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 74. South southwest wind 6 to 8 mph.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. South southwest wind 8 to 17 mph, with gusts as high as 26 mph.
Sunday Night
Mostly clear, with a low around 76. South wind 8 to 15 mph, with gusts as high as 23 mph.
Monday
Sunny, with a high near 93. South southwest wind 8 to 15 mph, with gusts as high as 23 mph.
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:
10:46 pm CDT Jun 22, 2026
Forecast Valid:
11pm CDT Jun 22, 2026-6pm CDT Jun 29, 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