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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 8:01 pm CST Jan 8, 2026 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
Tonight Friday Saturday Sunday Monday Tuesday Wednesday Thursday
40% chance of thunderstorms on Tonight 20% chance of rain on Friday 60% chance of rain & snow on Saturday Mostly Sunny on Sunday Mostly Sunny on Monday Mostly Cloudy on Tuesday 20% chance of rain & snow on Wednesday Partly Sunny on Thursday
Low: 42°F High: 46°F High: 37°F High: 30°F High: 40°F High: 44°F High: 35°F High: 29°F
Low: 33°F Low: 20°F Low: 23°F Low: 32°F Low: 31°F Low: 20°F  
Thunderstorms Rain Rain & Snow Mostly Sunny Mostly Sunny Mostly Cloudy Rain & Snow Partly Sunny
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Current Conditions at
PERU - (KVYS)
59°
Cloudy
as of 7:59 PM CST
Rel. Humidity: 93%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 29.38 in.
Flight Rule: VFR
Wind Data
16 MPH
170° South
Cloud Level(s): Solid Overcast at 8000ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
59°
Cloudy
Heavy Rain
as of 7:55 PM CST
Rel. Humidity: 100%
Dew Point: 59°F
Visibility: 1 Miles
Pressure: 29.42 in.
Flight Rule: IFR
Wind Data
21 MPH
Gust: 37 MPH
190° South
Cloud Level(s): Solid Overcast at 700ft
Current Conditions at
AURORA - (KARR)
55°
Cloudy
Light Rain
as of 7:52 PM CST
Rel. Humidity: 100%
Dew Point: 55°F
Visibility: 8 Miles
Pressure: 29.39 in.
Flight Rule: VFR
Wind Data
18 MPH
Gust: 30 MPH
170° South
Cloud Level(s): Broken at 7500ft, Solid Overcast at 8500ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
61°
Clear
as of 7:55 PM CST
Rel. Humidity: 93%
Dew Point: 59°F
Pressure: 29.42 in.
Wind Data
30 MPH
Gust: 46 MPH
180° South
40% chance of thunderstorms Tonight Tonight... A chance of rain and thunderstorms before midnight, then a chance of showers, mainly between midnight and 2am. Mostly cloudy, with a low around 42. Breezy, with a south wind around 20 mph becoming west southwest after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 40%.
20% chance of rain Friday Friday... A 20 percent chance of showers before 9am. Mostly cloudy, with a high near 46. Breezy, with a west wind 15 to 20 mph becoming north 5 to 10 mph in the afternoon. Winds could gust as high as 35 mph.
20% chance of rain & snow Friday Night Friday Night... A slight chance of rain and snow after midnight. Mostly cloudy, with a low around 33. North wind around 5 mph becoming calm. Chance of precipitation is 20%.
60% chance of rain & snow Saturday Saturday... Snow likely, possibly mixed with rain, mainly before noon. Partly sunny, with a high near 37. West northwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
30% chance of snow Saturday Night Saturday Night... A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 20. Breezy, with a west wind 15 to 20 mph, with gusts as high as 25 mph.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 30. Blustery.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 23.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 40.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 32.
Mostly Cloudy on Tuesday Tuesday... Mostly cloudy, with a high near 44.
20% chance of rain Tuesday Night Tuesday Night... A chance of rain. Cloudy, with a low around 31.
20% chance of rain & snow Wednesday Wednesday... A chance of rain and snow. Mostly cloudy, with a high near 35.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 20.
Partly Sunny on Thursday Thursday... Partly sunny, with a high near 29.
Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:21 AM
Sunset: 4:43 PM
Civil Sunrise:06:50 AM
Civil Sunset: 5:14 PM
Nautical Sunrise: 06:16 AM
Nautical Sunset: 5:48 PM
Astro Sunrise: 05:42 AM
Astro Sunset: 6:22 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.