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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 6:59 pm CST Jan 16, 2026 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
Tonight Saturday Sunday M.L.King Day Tuesday Wednesday Thursday Friday
20% chance of snow on Tonight 40% chance of snow on Saturday 30% chance of snow on Sunday Mostly Sunny on M.L.King Day Partly Sunny on Tuesday Mostly Cloudy on Wednesday Partly Sunny on Thursday Partly Sunny on Friday
Low: 16°F High: 18°F High: 22°F High: 10°F High: 22°F High: 32°F High: 24°F High: 27°F
Low: 9 °F Low: 3 °F Low: 4°F Low: 17°F Low: 14°F Low: 13°F  
Snow Snow Snow Mostly Sunny Partly Sunny Mostly Cloudy Partly Sunny Partly Sunny
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Current Conditions at
PERU - (KVYS)
34°
Feels like 24°F
Cloudy
as of 6:39 PM CST
Rel. Humidity: 59%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 29.68 in.
Flight Rule: VFR
Wind Data
14 MPH
Gust: 17 MPH
280° West
Cloud Level(s): Scattered at 4800ft, Solid Overcast at 8500ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
34°
Feels like 23°F
Cloudy
as of 6:35 PM CST
Rel. Humidity: 64%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 29.67 in.
Flight Rule: VFR
Wind Data
16 MPH
290° West
Cloud Level(s): Solid Overcast at 8500ft
Current Conditions at
AURORA - (KARR)
34°
Feels like 21°F
Cloudy
as of 5:52 PM CST
Rel. Humidity: 69%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 29.62 in.
Flight Rule: VFR
Wind Data
22 MPH
270° West
Cloud Level(s): Few at 4200ft, Broken at 8500ft, Solid Overcast at 12000ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
34°
Feels like 25°F
Cloudy
as of 6:35 PM CST
Rel. Humidity: 80%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 29.70 in.
Flight Rule: VFR
Wind Data
10 MPH
270° West
Cloud Level(s): Broken at 4600ft, Broken at 5500ft, Solid Overcast at 6500ft
20% chance of snow Tonight Tonight... Isolated snow showers before 5am. Mostly cloudy, with a low around 16. West northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
40% chance of snow Saturday Saturday... A 40 percent chance of snow, mainly after 3pm. Partly sunny, with a high near 18. Wind chill values as low as 1. Breezy, with a west wind 15 to 20 mph, with gusts as high as 25 mph.
20% chance of snow Saturday Night Saturday Night... A 20 percent chance of snow before 9pm. Mostly cloudy, with a low around 9. Wind chill values as low as -4. West wind 10 to 15 mph, with gusts as high as 25 mph.
30% chance of snow Sunday Sunday... A 30 percent chance of snow after noon. Mostly cloudy, with a high near 22. Wind chill values as low as -4. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
20% chance of snow Sunday Night Sunday Night... A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 3. Blustery, with a southwest wind 15 to 25 mph becoming west northwest after midnight. Winds could gust as high as 30 mph.
Mostly Sunny on M.L.King Day M.L.King Day... Mostly sunny and cold, with a high near 10. Blustery.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 4.
Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 22.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 17.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 32.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 14.
Partly Sunny on Thursday Thursday... Partly sunny, with a high near 24.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 13.
Partly Sunny on Friday Friday... Partly sunny, with a high near 27.
Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:18 AM
Sunset: 4:52 PM
Civil Sunrise:06:48 AM
Civil Sunset: 5:22 PM
Nautical Sunrise: 06:14 AM
Nautical Sunset: 5:56 PM
Astro Sunrise: 05:41 AM
Astro Sunset: 6:29 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.