Marion, Illinois Weather
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Weather Forecast for Marion, Illinois : Williamson County
Issued: 2:31 am CDT Jul 7, 2025 Latitude: 37.7306054 Longitude: -88.9331256 View on Google Maps

MouseOver for Detail Forecast
Overnight Monday Tuesday Wednesday Thursday Friday Saturday Sunday
20% chance of thunderstorms on Overnight 60% chance of thunderstorms on Monday 40% chance of thunderstorms on Tuesday 50% chance of thunderstorms on Wednesday 20% chance of thunderstorms on Thursday 20% chance of thunderstorms on Friday 20% chance of thunderstorms on Saturday 20% chance of thunderstorms on Sunday
Low: 72°F High: 87°F High: 89°F High: 87°F High: 89°F High: 92°F High: 89°F High: 89°F
Low: 71°F Low: 72°F Low: 72°F Low: 73°F Low: 72°F Low: 70°F  
Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms
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Current Conditions at
MARION - (KMWA)
72°
Clear
as of 2:15 AM CDST
Rel. Humidity: 94%
Dew Point: 70°F
Visibility: 10 Miles
Pressure: 29.96 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
CARBONDALE - (KMDH)
72°
Clear
as of 1:52 AM CDST
Rel. Humidity: 94%
Dew Point: 70°F
Visibility: 10 Miles
Pressure: 29.96 in.
Flight Rule: VFR
Wind Data
3 MPH
250° West
Cloud Level(s): Clear
Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
73°
Clear
as of 2:15 AM CDST
Rel. Humidity: 94%
Dew Point: 72°F
Visibility: 10 Miles
Pressure: 29.96 in.
Flight Rule: VFR
Wind Data
3 MPH
250° West
Cloud Level(s): Clear
Current Conditions at
METROPOLIS MUNI ARP - (KM30)
75°
Clear
as of 2:15 AM CDST
Rel. Humidity: 83%
Dew Point: 70°F
Visibility: 10 Miles
Pressure: 29.98 in.
Flight Rule: VFR
Wind Data
6 MPH
270° West
Cloud Level(s): Clear
20% chance of thunderstorms Overnight Overnight... A slight chance of showers, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 72. Calm wind. Chance of precipitation is 20%.
60% chance of thunderstorms Monday Monday... Showers and thunderstorms likely, mainly between 1pm and 4pm. Partly sunny, with a high near 87. Calm wind becoming west around 6 mph in the morning. Chance of precipitation is 60%.
30% chance of thunderstorms Monday Night Monday Night... A chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Partly cloudy, with a low around 71. Calm wind. Chance of precipitation is 30%.
40% chance of thunderstorms Tuesday Tuesday... A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89. Light southwest wind.
40% chance of thunderstorms Tuesday Night Tuesday Night... A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Calm wind.
50% chance of thunderstorms Wednesday Wednesday... A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly cloudy, with a high near 87. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 50%.
20% chance of thunderstorms Wednesday Night Wednesday Night... A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Calm wind.
20% chance of thunderstorms Thursday Thursday... A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 89. Light southwest wind.
10% chance of thunderstorms Thursday Night Thursday Night... A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73. Light south wind.
20% chance of thunderstorms Friday Friday... A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 92. South wind 3 to 8 mph.
20% chance of thunderstorms Friday Night Friday Night... A chance of showers and thunderstorms. Partly cloudy, with a low around 72. South wind around 6 mph.
20% chance of thunderstorms Saturday Saturday... A chance of showers and thunderstorms. Partly sunny, with a high near 89. West southwest wind 6 to 8 mph.
20% chance of thunderstorms Saturday Night Saturday Night... A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Southwest wind around 6 mph becoming calm in the evening.
20% chance of thunderstorms Sunday Sunday... A chance of showers and thunderstorms. Partly sunny, with a high near 89. Calm wind becoming west southwest around 5 mph in the afternoon.
Current Radar Image


Sun Almanac for Marion, Illinois
Sunrise: 05:41 AM
Sunset: 8:20 PM
Civil Sunrise:05:10 AM
Civil Sunset: 8:51 PM
Nautical Sunrise: 04:32 AM
Nautical Sunset: 9:30 PM
Astro Sunrise: 03:49 AM
Astro Sunset: 10:13 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.