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Glenn, Illinois Weather Forecast
Glenn, Illinois Weather
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Weather Forecast for Glenn, Illinois : Jackson County
Issued: 7:52 am CST Nov 5, 2025 Latitude: 37.8036625 Longitude: -89.5806546 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Thursday Friday Saturday Sunday Monday Veterans Day
Sunny on Today Clear on Tonight Sunny on Thursday 50% chance of thunderstorms on Friday Sunny on Saturday Mostly Sunny on Sunday Sunny on Monday Sunny on Veterans Day
High: 71°F Low: 40°F High: 65°F High: 73°F High: 67°F High: 46°F High: 44°F High: 53°F
Low: 52°F Low: 43°F Low: 38°F Low: 24°F Low: 27°F  
Sunny Clear Sunny Thunderstorms Sunny Mostly Sunny Sunny Sunny
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Current Conditions at
CARBONDALE - (KMDH)
54°
Clear
as of 6:52 AM CST
Rel. Humidity: 71%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: VFR
Wind Data
10 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
SPARTA - (KSAR)
55°
Clear
as of 7:35 AM CST
Rel. Humidity: 71%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: VFR
Wind Data
7 MPH
190° South
Cloud Level(s): Clear
Current Conditions at
MARION - (KMWA)
54°
Clear
as of 6:45 AM CST
Rel. Humidity: 76%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 30.07 in.
Flight Rule: VFR
Wind Data
8 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
CAIRO - (KCIR)
52°
Clear
as of 7:35 AM CST
Rel. Humidity: 81%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
6 MPH
210° Southwest
Cloud Level(s): Clear
Sunny on Today Today... Sunny, with a high near 71. South southwest wind 8 to 10 mph becoming north northwest in the afternoon. Winds could gust as high as 18 mph.

Clear on Tonight Tonight... Clear, with a low around 40. North wind around 6 mph becoming light and variable after midnight.

Sunny on Thursday Thursday... Sunny, with a high near 65. Light east wind becoming southeast 5 to 10 mph in the morning.

20% chance of rain Thursday Night Thursday Night... A 20 percent chance of showers after midnight. Partly cloudy, with a low around 52. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.

50% chance of thunderstorms Friday Friday... A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 73. South southwest wind 7 to 13 mph becoming west in the afternoon. Winds could gust as high as 18 mph.

Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 43. West wind around 5 mph becoming calm in the evening.

Sunny on Saturday Saturday... Sunny, with a high near 67. Light and variable wind becoming south southwest 5 to 10 mph in the morning.

10% chance of rain Saturday Night Saturday Night... A slight chance of showers. Partly cloudy, with a low around 38. West southwest wind 9 to 11 mph becoming northwest after midnight.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 46. Northwest wind 11 to 16 mph, with gusts as high as 25 mph.

Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 24. Northwest wind 6 to 10 mph.

Sunny on Monday Monday... Sunny, with a high near 44. West northwest wind 6 to 10 mph.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 27. West wind 3 to 5 mph.

Sunny on Veterans Day Veterans Day... Sunny, with a high near 53. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.

Current Radar Image


Sun Almanac for Glenn, Illinois
Sunrise: 06:29 AM
Sunset: 4:55 PM
Civil Sunrise:06:01 AM
Civil Sunset: 5:23 PM
Nautical Sunrise: 05:30 AM
Nautical Sunset: 5:54 PM
Astro Sunrise: 04:59 AM
Astro Sunset: 6:25 PM
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