Jonesboro, Illinois Weather
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Click for Hazardous Weather Outlook for Jonesboro, Illinois
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Weather Forecast for Jonesboro, Illinois : Union County
Issued: 12:01 am CDT Sep 16, 2025 Latitude: 37.4517163 Longitude: -89.2681402 View on Google Maps

MouseOver for Detail Forecast
Overnight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Mostly Clear on Overnight Morning Fog on Tuesday Sunny on Wednesday Sunny on Thursday 20% chance of thunderstorms on Friday 20% chance of thunderstorms on Saturday 20% chance of thunderstorms on Sunday 10% chance of thunderstorms on Monday
Low: 71°F High: 93°F High: 93°F High: 93°F High: 87°F High: 87°F High: 86°F High: 84°F
Low: 66°F Low: 65°F Low: 67°F Low: 65°F Low: 65°F Low: 64°F  
Mostly Clear Morning Fog Sunny Sunny Thunderstorms Thunderstorms Thunderstorms Thunderstorms
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Current Conditions at
CARBONDALE - (KMDH)
66°
Clear
as of 12:52 AM CDST
Rel. Humidity: 100%
Dew Point: 66°F
Visibility: 10 Miles
Pressure: 30.08 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
MARION - (KMWA)
68°
Clear
as of 12:55 AM CDST
Rel. Humidity: 93%
Dew Point: 66°F
Visibility: 10 Miles
Pressure: 30.09 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
CAIRO - (KCIR)
70°
Clear
as of 12:55 AM CDST
Rel. Humidity: 88%
Dew Point: 66°F
Visibility: 10 Miles
Pressure: 30.08 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Mostly Clear on Overnight Overnight... Mostly clear, with a steady temperature around 71. Light east wind.
Morning Fog on Tuesday Tuesday... Patchy fog before 8am. Otherwise, sunny, with a high near 93. Calm wind becoming east northeast around 6 mph in the afternoon.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 66. East northeast wind around 5 mph becoming calm in the evening.
Sunny on Wednesday Wednesday... Sunny, with a high near 93. Light east northeast wind.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 65. Calm wind.
Sunny on Thursday Thursday... Sunny, with a high near 93. Calm wind becoming south around 5 mph in the afternoon.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 67. Light and variable wind.
20% chance of thunderstorms Friday Friday... A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. Calm wind becoming south southwest around 6 mph in the afternoon.
20% chance of rain Friday Night Friday Night... A chance of showers. Mostly cloudy, with a low around 65. Light south southeast wind.
20% chance of thunderstorms Saturday Saturday... A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Calm wind becoming south around 6 mph in the afternoon.
20% chance of thunderstorms Saturday Night Saturday Night... A chance of showers and thunderstorms. Partly cloudy, with a low around 65. Calm wind.
20% chance of thunderstorms Sunday Sunday... A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Calm wind becoming south southwest 5 to 7 mph in the morning.
20% chance of thunderstorms Sunday Night Sunday Night... A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Light south wind.
10% chance of thunderstorms Monday Monday... A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. South southwest wind 3 to 7 mph.
Current Radar Image


Sun Almanac for Jonesboro, Illinois
Sunrise: 06:40 AM
Sunset: 7:03 PM
Civil Sunrise:06:14 AM
Civil Sunset: 7:29 PM
Nautical Sunrise: 05:44 AM
Nautical Sunset: 8:00 PM
Astro Sunrise: 05:12 AM
Astro Sunset: 8:31 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.