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

84°F

29°C

Humidity 40%
Wind Speed SW 7 mph
Barometer 29.97 in (1014.5 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 11 Oct 4:52 pm CDT
Extended Forecast for

Jonesboro IL

  • Tonight

    Tonight: Mostly clear, with a low around 61. Light south wind.

    Low: 61 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 90. Light south southwest wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 18 mph.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 65. Southwest wind around 7 mph.

    Low: 65 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92. South southwest wind 5 to 10 mph.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 70. South southwest wind around 6 mph.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 86. South southwest wind 3 to 6 mph. Chance of precipitation is 80%.

    High: 86 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. Light and variable wind becoming south southwest 5 to 9 mph in the morning.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 58. West northwest wind 5 to 9 mph.

    Low: 58 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 61. Light south wind.
Columbus Day
Sunny, with a high near 90. Light south southwest wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 18 mph.
Monday Night
Clear, with a low around 65. Southwest wind around 7 mph.
Tuesday
Sunny, with a high near 92. South southwest wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 70. South southwest wind around 6 mph.
Wednesday
Showers and possibly a thunderstorm. High near 86. South southwest wind 3 to 6 mph. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 60%.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. Light and variable wind becoming south southwest 5 to 9 mph in the morning.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 58. West northwest wind 5 to 9 mph.
Friday
Partly sunny, with a high near 68. Breezy, with a north northwest wind 13 to 20 mph, with gusts as high as 25 mph.
Friday Night
Mostly clear, with a low around 43. North wind 10 to 17 mph, with gusts as high as 26 mph.
Saturday
Sunny, with a high near 60. North wind around 11 mph.
Saturday Night
Clear, with a low around 38. North northeast wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 66. Calm wind becoming south southeast around 6 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Jonesboro IL
 37.46°N 89.27°W
Last Update:
2:01 pm CDT Oct 11, 2026
Forecast Valid:
5pm CDT Oct 11, 2026-6pm CDT Oct 18, 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