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.

Overcast

35°F

2°C

Humidity 67%
Wind Speed N 15 mph
Barometer 30.16 in (1021.7 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 21 Feb 8:52 am CST
Extended Forecast for

Jonesboro IL

  • Today

    Today: A slight chance of snow showers before 1pm, then a chance of sprinkles between 1pm and 2pm. Mostly cloudy, with a high near 42. North wind around 8 mph. Chance of precipitation is 20%.

    High: 42 °F

    Slight Chance
    Snow Showers
    then Slight
    Chance
    Sprinkles/Snow

  • Tonight

    Tonight: Mostly clear, with a low around 24. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 36. Northwest wind 10 to 18 mph, with gusts as high as 29 mph.

    High: 36 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 17. North northwest wind 11 to 14 mph, with gusts as high as 23 mph.

    Low: 17 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 33. North northwest wind 7 to 13 mph, with gusts as high as 22 mph.

    High: 33 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 17. North northwest wind around 5 mph becoming calm in the evening.

    Low: 17 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 48. South southwest wind 5 to 14 mph, with gusts as high as 25 mph.

    High: 48 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40. South southwest wind around 11 mph, with gusts as high as 22 mph.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 60. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 60 °F

    Mostly Cloudy

Detailed Forecast

Today
A slight chance of snow showers before 1pm, then a chance of sprinkles between 1pm and 2pm. Mostly cloudy, with a high near 42. North wind around 8 mph. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 24. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 36. Northwest wind 10 to 18 mph, with gusts as high as 29 mph.
Sunday Night
Mostly clear, with a low around 17. North northwest wind 11 to 14 mph, with gusts as high as 23 mph.
Monday
Sunny, with a high near 33. North northwest wind 7 to 13 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 17. North northwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 48. South southwest wind 5 to 14 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 40. South southwest wind around 11 mph, with gusts as high as 22 mph.
Wednesday
Mostly cloudy, with a high near 60. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 42. South southwest wind 7 to 10 mph becoming north northwest after midnight.
Thursday
A chance of showers. Partly sunny, with a high near 54. North northwest wind 7 to 9 mph.
Thursday Night
A slight chance of showers. Mostly clear, with a low around 31. North northwest wind around 6 mph becoming light and variable.
Friday
Sunny, with a high near 58. South southwest wind 5 to 8 mph.
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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:
8:22 am CST Feb 21, 2026
Forecast Valid:
9am CST Feb 21, 2026-6pm CST Feb 27, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation