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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 3:56 am CST Jan 14, 2026 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Thursday Friday Saturday Sunday M.L.King Day Tuesday
30% chance of snow on Today Cloudy on Tonight Increasing Clouds on Thursday 40% chance of snow on Friday 20% chance of snow on Saturday Partly Sunny on Sunday Partly Sunny on M.L.King Day Partly Sunny on Tuesday
High: 22 °F Low: 13°F High: 26°F High: 36°F High: 16°F High: 17°F High: 18°F High: 20°F
Low: 23°F Low: 13°F Low: 6°F Low: 8°F Low: 5°F  
Snow Cloudy Increasing Clouds Snow Snow Partly Sunny Partly Sunny Partly Sunny
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Current Conditions at
PERU - (KVYS)
37°
Feels like 28°F
Cloudy
as of 4:19 AM CST
Rel. Humidity: 74%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 29.66 in.
Flight Rule: VFR
Wind Data
15 MPH
Gust: 20 MPH
280° West
Cloud Level(s): Solid Overcast at 3900ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
37°
Feels like 29°F
Cloudy
as of 4:15 AM CST
Rel. Humidity: 80%
Dew Point: 32°F
Visibility: 10 Miles
Pressure: 29.62 in.
Flight Rule: VFR
Wind Data
13 MPH
290° West
Cloud Level(s): Solid Overcast at 4200ft
Current Conditions at
AURORA - (KARR)
37°
Feels like 28°F
Cloudy
as of 3:52 AM CST
Rel. Humidity: 80%
Dew Point: 32°F
Visibility: 10 Miles
Pressure: 29.61 in.
Flight Rule: VFR
Wind Data
15 MPH
290° West
Cloud Level(s): Solid Overcast at 4500ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
39°
Feels like 30°F
Cloudy
as of 4:15 AM CST
Rel. Humidity: 69%
Dew Point: 30°F
Pressure: 29.66 in.
Wind Data
15 MPH
280° West
Cloud Level(s): Solid Overcast at 3100ft
30% chance of snow Today Today... Scattered snow showers or flurries before 11am, then scattered flurries between 11am and noon. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 22 by 5pm. Breezy, with a north northwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 30%.

Cloudy on Tonight Tonight... Partly cloudy, with a low around 13. Wind chill values as low as 1. North northwest wind 10 to 15 mph, with gusts as high as 30 mph.

Increasing Clouds on Thursday Thursday... Increasing clouds, with a high near 26. Wind chill values as low as zero. North northwest wind around 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.

80% chance of snow Thursday Night Thursday Night... Snow. Low around 23. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

40% chance of snow Friday Friday... A chance of snow before noon, then a chance of snow showers after noon. Mostly cloudy, with a high near 36. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

40% chance of snow Friday Night Friday Night... A 40 percent chance of snow showers. Mostly cloudy, with a low around 13.

20% chance of snow Saturday Saturday... A 20 percent chance of snow showers. Mostly cloudy, with a high near 16.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 6.

Partly Sunny on Sunday Sunday... Partly sunny, with a high near 17.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 8.

Partly Sunny on M.L.King Day M.L.King Day... Partly sunny, with a high near 18.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 5.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 20.

Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:19 AM
Sunset: 4:49 PM
Civil Sunrise:06:49 AM
Civil Sunset: 5:20 PM
Nautical Sunrise: 06:15 AM
Nautical Sunset: 5:54 PM
Astro Sunrise: 05:41 AM
Astro Sunset: 6:27 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.