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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 2:41 am CST Dec 29, 2025 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
Overnight Monday Tuesday Wednesday New Year's Day Friday Saturday Sunday
90% chance of blowing snow on Overnight 90% chance of blowing snow on Monday Partly Sunny on Tuesday 20% chance of snow on Wednesday Mostly Sunny on New Year's Day Partly Sunny on Friday Partly Sunny on Saturday Partly Sunny on Sunday
Low: 15°F High: 19°F High: 29°F High: 31°F High: 20°F High: 26°F High: 27°F High: 31°F
Low: 13°F Low: 26°F Low: 12°F Low: 12°F Low: 15°F Low: 16°F  
Blowing Snow Blowing Snow Partly Sunny Snow Mostly Sunny Partly Sunny Partly Sunny Partly Sunny
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Current Conditions at
PERU - (KVYS)
16°
Feels like -4°F
Cloudy
as of 2:15 AM CST
Rel. Humidity: 72%
Dew Point: 9°F
Visibility: 7 Miles
Pressure: 29.82 in.
Flight Rule: MVFR
Wind Data
32 MPH
Gust: 46 MPH
270° West
Cloud Level(s): Broken at 2100ft, Solid Overcast at 2600ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
16°
Feels like -6°F
Cloudy
Light Snow
as of 2:15 AM CST
Rel. Humidity: 78%
Dew Point: 10°F
Visibility: 7 Miles
Pressure: 29.75 in.
Flight Rule: MVFR
Wind Data
37 MPH
Gust: 46 MPH
270° West
Cloud Level(s): Solid Overcast at 1800ft
Current Conditions at
AURORA - (KARR)
16°
Feels like -4°F
Cloudy
Light Snow
as of 2:29 AM CST
Rel. Humidity: 78%
Dew Point: 10°F
Visibility: 1 1/2 Miles
Pressure: 29.71 in.
Flight Rule: IFR
Wind Data
32 MPH
Gust: 44 MPH
280° West
Cloud Level(s): Broken at 1300ft, Solid Overcast at 4000ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
16°
Feels like -6°F
Cloudy
as of 2:15 AM CST
Rel. Humidity: 66%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 29.83 in.
Flight Rule: MVFR
Wind Data
38 MPH
Gust: 47 MPH
270° West
Cloud Level(s): Solid Overcast at 2400ft
90% chance of blowing snow Overnight Overnight... Periods of snow showers. Patchy blowing snow. Low around 15. Wind chill values as low as -6. Very windy, with a west wind 30 to 35 mph, with gusts as high as 50 mph. Chance of precipitation is 90%. Total nighttime snow accumulation of less than a half inch possible.
90% chance of blowing snow Monday Monday... Snow showers, mainly before 8am, then scattered flurries after 9am. Areas of blowing snow before 8am. High near 19. Wind chill values as low as -4. Windy, with a west northwest wind 20 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Partly Cloudy on Monday Night Monday Night... Cloudy, then gradually becoming partly cloudy, with a low around 13. Wind chill values as low as zero. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 29. Wind chill values as low as zero. West southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 26. West wind 10 to 15 mph, with gusts as high as 20 mph.
20% chance of snow Wednesday Wednesday... A 20 percent chance of snow after noon. Cloudy, with a high near 31.
30% chance of snow Wednesday Night Wednesday Night... A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 12.
Mostly Sunny on New Year's Day New Year's Day... Mostly sunny, with a high near 20.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 12.
Partly Sunny on Friday Friday... Partly sunny, with a high near 26.
Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 15.
Partly Sunny on Saturday Saturday... Partly sunny, with a high near 27.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 16.
Partly Sunny on Sunday Sunday... Partly sunny, with a high near 31.
Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:21 AM
Sunset: 4:34 PM
Civil Sunrise:06:50 AM
Civil Sunset: 5:05 PM
Nautical Sunrise: 06:15 AM
Nautical Sunset: 5:40 PM
Astro Sunrise: 05:41 AM
Astro Sunset: 6:14 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.