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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 4:06 pm CST Jan 27, 2026 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
Tonight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
Mostly Clear on Tonight Sunny on Wednesday Partly Sunny on Thursday Mostly Sunny on Friday Mostly Sunny on Saturday 20% chance of snow on Sunday Mostly Cloudy on Monday Partly Sunny on Tuesday
Low: 1 °F High: 18°F High: 15°F High: 15°F High: 22°F High: 25°F High: 28°F High: 28°F
Low: 1 °F Low: 0 °F Low: 5°F Low: 7°F Low: 14°F Low: 14°F  
Mostly Clear Sunny Partly Sunny Mostly Sunny Mostly Sunny Snow Mostly Cloudy Partly Sunny
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Current Conditions at
PERU - (KVYS)
16°
Feels like 0°F
Clear
as of 3:40 PM CST
Rel. Humidity: 52%
Dew Point: 1°F
Visibility: 10 Miles
Pressure: 30.26 in.
Flight Rule: VFR
Wind Data
17 MPH
Gust: 24 MPH
280° West
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
16°
Feels like 0°F
Clear
as of 3:40 PM CST
Rel. Humidity: 52%
Dew Point: 1°F
Visibility: 10 Miles
Pressure: 30.23 in.
Flight Rule: VFR
Wind Data
16 MPH
310° Northwest
Cloud Level(s): Clear
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
16°
Feels like -1°F
Clear
as of 3:35 PM CST
Rel. Humidity: 52%
Dew Point: 1°F
Visibility: 10 Miles
Pressure: 30.25 in.
Flight Rule: VFR
Wind Data
22 MPH
Gust: 26 MPH
290° West
Cloud Level(s): Clear
Mostly Clear on Tonight Tonight... Mostly clear, with a low around 1. Wind chill values as low as -12. West wind 5 to 10 mph.
Sunny on Wednesday Wednesday... Sunny, with a high near 18. Wind chill values as low as -12. West wind 10 to 15 mph, with gusts as high as 20 mph.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 1. Wind chill values as low as -8. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Partly Sunny on Thursday Thursday... Partly sunny, with a high near 15. Wind chill values as low as -8. North northwest wind around 5 mph, with gusts as high as 15 mph.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 0. North wind 5 to 10 mph, with gusts as high as 15 mph.
Mostly Sunny on Friday Friday... Mostly sunny, with a high near 15.
Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 5.
Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 22.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 7.
20% chance of snow Sunday Sunday... A chance of snow after noon. Mostly sunny, with a high near 25.
20% chance of snow Sunday Night Sunday Night... A chance of snow. Mostly cloudy, with a low around 14.
Mostly Cloudy on Monday Monday... Mostly cloudy, with a high near 28.
Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 14.
Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 28.
Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:11 AM
Sunset: 5:05 PM
Civil Sunrise:06:41 AM
Civil Sunset: 5:35 PM
Nautical Sunrise: 06:08 AM
Nautical Sunset: 6:08 PM
Astro Sunrise: 05:35 AM
Astro Sunset: 6:41 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.