Green Bay, Illinois Weather
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Weather Forecast for Green Bay, Illinois : Cook County
Issued: 3:12 am CDT Sep 16, 2025 Latitude: 41.7353128 Longitude: -87.5506014 View on Google Maps

MouseOver for Detail Forecast
Overnight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Patchy Fog on Overnight Morning Fog on Tuesday Sunny on Wednesday Sunny on Thursday Mostly Sunny on Friday 20% chance of on Saturday 20% chance of on Sunday 20% chance of on Monday
Low: 64°F High: 75°F High: 76°F High: 78°F High: 77°F High: 75°F High: 77°F High: 80°F
Low: 66°F Low: 66°F Low: 67°F Low: 66°F Low: 66°F Low: 67°F  
Patchy Fog Morning Fog Sunny Sunny Mostly Sunny Partly Sunny Partly Sunny Partly Sunny
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Current Conditions at
CHICAGO-MIDWAY - (KMDW)
66°
Clear
as of 2:53 AM CDST
Rel. Humidity: 82%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
GARY - (KGYY)
64°
Clear
as of 3:35 AM CDST
Rel. Humidity: 100%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 30.18 in.
Flight Rule: VFR
Wind Data
5 MPH
160° South
Cloud Level(s): Clear
Current Conditions at
LANSING MUNICIPAL - (KIGQ)
61°
Clear
as of 3:35 AM CDST
Rel. Humidity: 93%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 30.20 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Patchy Fog on Overnight Overnight... Patchy fog. Otherwise, mostly clear, with a low around 64. Southeast wind around 5 mph.
Morning Fog on Tuesday Tuesday... Patchy fog before 8am. Otherwise, sunny, with a high near 75. East wind 5 to 10 mph becoming north northeast in the afternoon.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 66. Northeast wind around 5 mph, with gusts as high as 10 mph.
Sunny on Wednesday Wednesday... Sunny, with a high near 76. Calm wind becoming northeast around 5 mph in the afternoon. Winds could gust as high as 10 mph.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 66. Northeast wind around 5 mph becoming calm after midnight.
Sunny on Thursday Thursday... Sunny, with a high near 78.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 67.
Mostly Sunny on Friday Friday... Mostly sunny, with a high near 77.
20% chance of rain Friday Night Friday Night... A chance of showers after 1am. Mostly cloudy, with a low around 66.
20% chance of Saturday Saturday... A chance of showers. Partly sunny, with a high near 75.
20% chance of rain Saturday Night Saturday Night... A chance of showers. Mostly cloudy, with a low around 66.
20% chance of Sunday Sunday... A chance of showers. Partly sunny, with a high near 77.
20% chance of rain Sunday Night Sunday Night... A chance of showers. Mostly cloudy, with a low around 67.
20% chance of Monday Monday... A chance of showers. Partly sunny, with a high near 80.
Current Radar Image


Sun Almanac for Green Bay, Illinois
Sunrise: 06:32 AM
Sunset: 6:58 PM
Civil Sunrise:06:04 AM
Civil Sunset: 7:26 PM
Nautical Sunrise: 05:31 AM
Nautical Sunset: 7:58 PM
Astro Sunrise: 04:58 AM
Astro Sunset: 8:32 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.