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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 6:01 pm CST Jan 9, 2026 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
Tonight Saturday Sunday Monday Tuesday Wednesday Thursday Friday
70% chance of rain on Tonight 90% chance of rain & snow on Saturday Mostly Sunny on Sunday Mostly Sunny on Monday 20% chance of rain on Tuesday 20% chance of snow on Wednesday Mostly Sunny on Thursday 20% chance of snow on Friday
Low: 34°F High: 37°F High: 32°F High: 42°F High: 47°F High: 34°F High: 30°F High: 34°F
Low: 21°F Low: 25°F Low: 32°F Low: 30°F Low: 18°F Low: 23°F  
Rain Rain & Snow Mostly Sunny Mostly Sunny Rain Snow Mostly Sunny Snow
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Current Conditions at
PERU - (KVYS)
43°
Cloudy
as of 8:18 PM CST
Rel. Humidity: 81%
Dew Point: 37°F
Visibility: 10 Miles
Pressure: 30.18 in.
Flight Rule: MVFR
Wind Data
6 MPH
080° East
Cloud Level(s): Solid Overcast at 2400ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
41°
Cloudy
as of 8:15 PM CST
Rel. Humidity: 86%
Dew Point: 37°F
Visibility: 10 Miles
Pressure: 30.20 in.
Flight Rule: MVFR
Wind Data
5 MPH
080° East
Cloud Level(s): Solid Overcast at 1500ft
Current Conditions at
AURORA - (KARR)
39°
Cloudy
as of 7:52 PM CST
Rel. Humidity: 86%
Dew Point: 36°F
Visibility: 8 Miles
Pressure: 30.19 in.
Flight Rule: MVFR
Wind Data
3 MPH
110° East
Cloud Level(s): Solid Overcast at 1400ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
43°
Cloudy
as of 8:15 PM CST
Rel. Humidity: 86%
Dew Point: 39°F
Pressure: 30.18 in.
Wind Data
6 MPH
060° Northeast
Cloud Level(s): Solid Overcast at 2400ft
70% chance of rain Tonight Tonight... Rain likely, mainly after 3am. Cloudy, with a low around 34. East northeast wind around 5 mph becoming west after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
90% chance of rain & snow Saturday Saturday... Rain and snow, becoming all snow after 7am. High near 37. Breezy, with a west wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
40% chance of snow Saturday Night Saturday Night... Scattered snow showers, mainly before midnight. Mostly cloudy, with a low around 21. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 32. Breezy, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 25. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 42.
Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 32.
20% chance of rain Tuesday Tuesday... A chance of rain after noon. Mostly cloudy, with a high near 47.
20% chance of rain & snow Tuesday Night Tuesday Night... A chance of rain before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 30.
20% chance of snow Wednesday Wednesday... A chance of snow after noon. Mostly cloudy, with a high near 34.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 18.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 30.
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. Mostly cloudy, with a high near 34.
Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:21 AM
Sunset: 4:44 PM
Civil Sunrise:06:50 AM
Civil Sunset: 5:15 PM
Nautical Sunrise: 06:16 AM
Nautical Sunset: 5:49 PM
Astro Sunrise: 05:42 AM
Astro Sunset: 6:23 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.