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Cass, Illinois Weather Forecast
Cass, Illinois Weather
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Weather Forecast for Cass, Illinois : Cass County
Issued: 12:36 am CST Dec 21, 2025 Latitude: 39.968104 Longitude: -90.2692888 View on Google Maps

MouseOver for Detail Forecast
Overnight Sunday Monday Tuesday Wednesday Christmas Day Friday Saturday
Mostly Clear on Overnight Sunny on Sunday Mostly Cloudy on Monday Mostly Sunny on Tuesday Cloudy on Wednesday Mostly Sunny on Christmas Day Mostly Cloudy on Friday Mostly Cloudy on Saturday
Low: 23°F High: 40°F High: 47°F High: 54°F High: 60°F High: 67°F High: 57°F High: 50°F
Low: 27°F Low: 39°F Low: 34°F Low: 50°F Low: 43°F Low: 36°F  
Mostly Clear Sunny Mostly Cloudy Mostly Sunny Cloudy Mostly Sunny Mostly Cloudy Mostly Cloudy
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Current Conditions at
JACKSONVILLE MUNICIPAL - (KIJX)
28°
Clear
as of 12:55 AM CST
Rel. Humidity: 63%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.30 in.
Flight Rule: VFR
Wind Data
6 MPH
290° West
Cloud Level(s): Clear
Current Conditions at
SPRINGFIELD - (KSPI)
30°
Clear
as of 12:52 AM CST
Rel. Humidity: 63%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: VFR
Wind Data
3 MPH
280° West
Cloud Level(s): Clear
Current Conditions at
MACOMB MUNICIPAL AIRPORT - (KMQB)
25°
Feels like 15°F
Clear
as of 12:55 AM CST
Rel. Humidity: 73%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.30 in.
Flight Rule: VFR
Wind Data
9 MPH
300° Northwest
Cloud Level(s): Clear
Mostly Clear on Overnight Overnight... Mostly clear, with a low around 23. Northwest wind 5 to 7 mph.

Sunny on Sunday Sunday... Sunny, with a high near 40. Light and variable wind becoming southeast around 6 mph in the afternoon.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 27. South southeast wind 6 to 10 mph, with gusts as high as 18 mph.

Mostly Cloudy on Monday Monday... Mostly cloudy, with a high near 47. South southeast wind 9 to 11 mph, with gusts as high as 21 mph.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 39. South southwest wind 6 to 9 mph, with gusts as high as 17 mph.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 54. West southwest wind around 6 mph becoming north northeast in the afternoon.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 34. North northeast wind 5 to 7 mph becoming east southeast after midnight. Winds could gust as high as 15 mph.

Cloudy on Wednesday Wednesday... Cloudy, with a high near 60.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 50.

Mostly Sunny on Christmas Day Christmas Day... Mostly sunny, with a high near 67.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 43.

Mostly Cloudy on Friday Friday... Mostly cloudy, with a high near 57.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 36.

Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 50.

Current Radar Image


Sun Almanac for Cass, Illinois
Sunrise: 07:20 AM
Sunset: 4:39 PM
Civil Sunrise:06:49 AM
Civil Sunset: 5:10 PM
Nautical Sunrise: 06:15 AM
Nautical Sunset: 5:44 PM
Astro Sunrise: 05:42 AM
Astro Sunset: 6:17 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.