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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 3:51 am CST Dec 1, 2025 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Tuesday Wednesday Thursday Friday Saturday Sunday
100% chance of snow on Today 100% chance of snow on Tonight Partly Sunny on Tuesday 40% chance of snow on Wednesday Sunny on Thursday Partly Sunny on Friday Mostly Cloudy on Saturday Mostly Cloudy on Sunday
High: 27°F Low: 15°F High: 23°F High: 32°F High: 9°F High: 24°F High: 29°F High: 27°F
Low: 17°F Low: -2°F Low: -6°F Low: 15°F Low: 17°F  
Snow Snow Partly Sunny Snow Sunny Partly Sunny Mostly Cloudy Mostly Cloudy
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Current Conditions at
PERU - (KVYS)
23°
Cloudy
Mist
as of 9:55 AM CST
Rel. Humidity: 92%
Dew Point: 21°F
Visibility: 5 Miles
Pressure: 30.36 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 2900ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
21°
Mostly Cloudy
Mist
as of 9:55 AM CST
Rel. Humidity: 100%
Dew Point: 21°F
Visibility: 2 Miles
Pressure: 30.37 in.
Flight Rule: LIFR
Wind Data
3 MPH
170° South
Cloud Level(s): Broken at 300ft
Current Conditions at
AURORA - (KARR)
25°
Cloudy
Haze
as of 10:01 AM CST
Rel. Humidity: 79%
Dew Point: 19°F
Visibility: 3 Miles
Pressure: 30.36 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 2900ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
21°
Partly Cloudy
Mist
as of 9:55 AM CST
Rel. Humidity: 92%
Dew Point: 19°F
Visibility: 5 Miles
Pressure: 30.38 in.
Flight Rule: MVFR
Wind Data
3 MPH
120° Southeast
Cloud Level(s): Scattered at 12000ft
100% chance of snow Today Today... Snow, mainly after 11am. High near 27. Calm wind becoming south southeast around 5 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 1 to 3 inches possible.

100% chance of snow Tonight Tonight... Snow, mainly before 11pm. Low around 15. Calm wind becoming west northwest around 5 mph in the evening. Winds could gust as high as 10 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 23. West northwest wind around 5 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 17. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

40% chance of snow Wednesday Wednesday... A 40 percent chance of snow after noon. Cloudy, with a high near 32. South southwest wind around 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.

20% chance of snow Wednesday Night Wednesday Night... A 20 percent chance of snow before midnight. Mostly cloudy, with a low around -2.

Sunny on Thursday Thursday... Sunny and cold, with a high near 9.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around -6.

Partly Sunny on Friday Friday... Partly sunny, with a high near 24.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 15.

Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 29.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 17.

Mostly Cloudy on Sunday Sunday... Mostly cloudy, with a high near 27.

Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:02 AM
Sunset: 4:26 PM
Civil Sunrise:06:32 AM
Civil Sunset: 4:57 PM
Nautical Sunrise: 05:57 AM
Nautical Sunset: 5:32 PM
Astro Sunrise: 05:24 AM
Astro Sunset: 6:05 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.