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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 10:56 am CST Jan 22, 2026 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Friday Saturday Sunday Monday Tuesday Wednesday
20% chance of snow on Today 20% chance of snow on Tonight Mostly Sunny on Friday 30% chance of snow on Saturday 40% chance of snow on Sunday Mostly Sunny on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday
High: 28°F Low: -8°F High: 2 °F High: 9 °F High: 15°F High: 14°F High: 23°F High: 20°F
Low: -4°F Low: 4 °F Low: -1°F Low: 5°F Low: 9°F  
Snow Snow Mostly Sunny Snow Snow Mostly Sunny Mostly Sunny Partly Sunny
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Current Conditions at
PERU - (KVYS)
27°
Feels like 15°F
Clear
as of 10:39 AM CST
Rel. Humidity: 45%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.24 in.
Flight Rule: VFR
Wind Data
14 MPH
Gust: 23 MPH
260° West
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
25°
Feels like 10°F
Clear
as of 10:35 AM CST
Rel. Humidity: 45%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 30.23 in.
Flight Rule: VFR
Wind Data
21 MPH
Gust: 26 MPH
280° West
Cloud Level(s): Clear
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
28°
Feels like 14°F
Clear
as of 10:35 AM CST
Rel. Humidity: 42%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.26 in.
Flight Rule: VFR
Wind Data
24 MPH
Gust: 30 MPH
270° West
Cloud Level(s): Clear
20% chance of snow Today Today... A chance of flurries after noon. Partly sunny, with a high near 28. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 35 mph.
20% chance of snow Tonight Tonight... A chance of flurries before midnight. Partly cloudy, with a low around -8. Wind chill values as low as -27. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Mostly Sunny on Friday Friday... Mostly sunny and cold, with a high near 2. Wind chill values as low as -30. North northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around -4. Wind chill values as low as -18. North wind 5 to 10 mph, with gusts as high as 15 mph.
30% chance of snow Saturday Saturday... A 30 percent chance of snow after noon. Mostly cloudy and cold, with a high near 9. East northeast wind around 5 mph, with gusts as high as 10 mph.
60% chance of snow Saturday Night Saturday Night... Snow likely, mainly after midnight. Cloudy, with a low around 4. Chance of precipitation is 60%.
40% chance of snow Sunday Sunday... A 40 percent chance of snow. Mostly cloudy, with a high near 15.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around -1.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 14.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 5.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 23.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 9.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 20.
Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:15 AM
Sunset: 4:59 PM
Civil Sunrise:06:45 AM
Civil Sunset: 5:29 PM
Nautical Sunrise: 06:11 AM
Nautical Sunset: 6:03 PM
Astro Sunrise: 05:38 AM
Astro Sunset: 6:35 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.