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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 8:51 pm CST Jan 19, 2026 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
Tonight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Mostly Clear on Tonight Increasing Clouds on Tuesday Partly Sunny on Wednesday Mostly Sunny on Thursday Partly Sunny on Friday Partly Sunny on Saturday Mostly Sunny on Sunday Mostly Sunny on Monday
Low: 2 °F High: 25°F High: 31°F High: 23°F High: 1°F High: 6°F High: 13°F High: 21°F
Low: 28 °F Low: 15°F Low: -4°F Low: -9°F Low: -4°F Low: 3°F  
Mostly Clear Increasing Clouds Partly Sunny Mostly Sunny Partly Sunny Partly Sunny Mostly Sunny Mostly Sunny
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Current Conditions at
PERU - (KVYS)
Feels like -7°F
Cloudy
as of 8:39 PM CST
Rel. Humidity: 60%
Dew Point: -4°F
Visibility: 10 Miles
Pressure: 30.35 in.
Flight Rule: VFR
Wind Data
10 MPH
260° West
Cloud Level(s): Scattered at 7500ft, Solid Overcast at 9000ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
Feels like -9°F
Partly Cloudy
as of 8:35 PM CST
Rel. Humidity: 60%
Dew Point: -4°F
Visibility: 10 Miles
Pressure: 30.33 in.
Flight Rule: VFR
Wind Data
13 MPH
280° West
Cloud Level(s): Scattered at 9500ft
Current Conditions at
AURORA - (KARR)
Feels like -15°F
Mostly Cloudy
as of 7:52 PM CST
Rel. Humidity: 71%
Dew Point: -4°F
Visibility: 10 Miles
Pressure: 30.30 in.
Flight Rule: VFR
Wind Data
15 MPH
280° West
Cloud Level(s): Broken at 11000ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
Feels like -7°F
Mostly Cloudy
as of 8:35 PM CST
Rel. Humidity: 55%
Dew Point: -6°F
Visibility: 10 Miles
Pressure: 30.36 in.
Flight Rule: VFR
Wind Data
10 MPH
270° West
Cloud Level(s): Broken at 11000ft
Mostly Clear on Tonight Tonight... Mostly cloudy, then gradually becoming mostly clear, with a low around 2. Wind chill values as low as -9. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.

Increasing Clouds on Tuesday Tuesday... Increasing clouds, with a high near 25. Wind chill values as low as -7. West southwest wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 15 mph.

50% chance of snow Tuesday Night Tuesday Night... A 50 percent chance of snow, mainly after midnight. Cloudy, with a temperature rising to around 28 by 2am. South southeast wind 5 to 15 mph becoming southwest after midnight. Winds could gust as high as 20 mph.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 31. West wind 10 to 15 mph, with gusts as high as 25 mph.

20% chance of snow Wednesday Night Wednesday Night... A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 15. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 23.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around -4.

Partly Sunny on Friday Friday... Partly sunny and cold, with a high near 1.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around -9.

Partly Sunny on Saturday Saturday... Partly sunny and cold, with a high near 6.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around -4.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 13.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 3.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 21.

Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:17 AM
Sunset: 4:55 PM
Civil Sunrise:06:47 AM
Civil Sunset: 5:25 PM
Nautical Sunrise: 06:13 AM
Nautical Sunset: 5:59 PM
Astro Sunrise: 05:40 AM
Astro Sunset: 6:32 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.