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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 5:41 pm CST Jan 11, 2026 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
Tonight Monday Tuesday Wednesday Thursday Friday Saturday Sunday
Partly Cloudy on Tonight Mostly Sunny on Monday 20% chance of rain on Tuesday 50% chance of rain & snow on Wednesday Mostly Sunny on Thursday 20% chance of snow on Friday Mostly Cloudy on Saturday Mostly Sunny on Sunday
Low: 27°F High: 43°F High: 50°F High: 37°F High: 28°F High: 34°F High: 24°F High: 23°F
Low: 33°F Low: 31°F Low: 15°F Low: 23°F Low: 18°F Low: 10°F  
Partly Cloudy Mostly Sunny Rain Rain & Snow Mostly Sunny Snow Mostly Cloudy Mostly Sunny
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Current Conditions at
PERU - (KVYS)
27°
Cloudy
as of 5:59 PM CST
Rel. Humidity: 79%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.42 in.
Flight Rule: MVFR
Wind Data
7 MPH
240° Southwest
Cloud Level(s): Solid Overcast at 1400ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
28°
Feels like 18°F
Cloudy
as of 5:55 PM CST
Rel. Humidity: 74%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.41 in.
Flight Rule: MVFR
Wind Data
12 MPH
Gust: 17 MPH
250° West
Cloud Level(s): Solid Overcast at 2000ft
Current Conditions at
AURORA - (KARR)
27°
Feels like 16°F
Cloudy
as of 5:57 PM CST
Rel. Humidity: 79%
Dew Point: 21°F
Visibility: 9 Miles
Pressure: 30.38 in.
Flight Rule: MVFR
Wind Data
12 MPH
260° West
Cloud Level(s): Solid Overcast at 1800ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
28°
Feels like 18°F
Cloudy
as of 5:55 PM CST
Rel. Humidity: 74%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.44 in.
Flight Rule: MVFR
Wind Data
12 MPH
240° Southwest
Cloud Level(s): Solid Overcast at 1600ft
Partly Cloudy on Tonight Tonight... Cloudy, then gradually becoming partly cloudy, with a low around 27. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 43. West southwest wind around 10 mph, with gusts as high as 20 mph.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 33. Southwest wind around 10 mph, with gusts as high as 20 mph.

20% chance of rain Tuesday Tuesday... A 20 percent chance of rain after noon. Partly sunny, with a high near 50. Southwest wind around 15 mph, with gusts as high as 25 mph.

20% chance of rain Tuesday Night Tuesday Night... A 20 percent chance of rain. Mostly cloudy, with a low around 31. West northwest wind around 15 mph, with gusts as high as 20 mph.

50% chance of rain & snow Wednesday Wednesday... A chance of rain and snow before noon, then a chance of snow. Mostly cloudy, with a high near 37. Breezy. Chance of precipitation is 50%.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 15. Blustery.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 28.

20% chance of snow Thursday Night Thursday Night... A chance of snow. Mostly cloudy, with a low around 23.

20% chance of snow Friday Friday... A chance of snow after noon. Mostly cloudy, with a high near 34.

20% chance of snow Friday Night Friday Night... A chance of snow. Mostly cloudy, with a low around 18.

Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 24.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 10.

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

Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:20 AM
Sunset: 4:46 PM
Civil Sunrise:06:50 AM
Civil Sunset: 5:17 PM
Nautical Sunrise: 06:15 AM
Nautical Sunset: 5:51 PM
Astro Sunrise: 05:42 AM
Astro Sunset: 6:24 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.