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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 3:11 pm CST Dec 7, 2025 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
Tonight Monday Tuesday Wednesday Thursday Friday Saturday Sunday
Increasing Clouds on Tonight Partly Sunny on Monday Mostly Cloudy on Tuesday 20% chance of rain & snow on Wednesday 20% chance of snow on Thursday Mostly Cloudy on Friday Partly Sunny on Saturday Mostly Sunny on Sunday
Low: 4 °F High: 22°F High: 36°F High: 34°F High: 24°F High: 15°F High: 8°F High: 13°F
Low: 16 °F Low: 33°F Low: 17°F Low: 7°F Low: -1°F Low: -2°F  
Increasing Clouds Partly Sunny Mostly Cloudy Rain & Snow Snow Mostly Cloudy Partly Sunny Mostly Sunny
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Current Conditions at
PERU - (KVYS)
18°
Feels like 5°F
Clear
as of 3:55 PM CST
Rel. Humidity: 78%
Dew Point: 12°F
Visibility: 10 Miles
Pressure: 30.25 in.
Flight Rule: VFR
Wind Data
10 MPH
0° North
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
18°
Partly Cloudy
as of 4:15 PM CST
Rel. Humidity: 85%
Dew Point: 14°F
Visibility: 10 Miles
Pressure: 30.23 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Scattered at 1700ft
Current Conditions at
AURORA - (KARR)
16°
Feels like 2°F
Clear
as of 3:52 PM CST
Rel. Humidity: 66%
Dew Point: 7°F
Visibility: 8 Miles
Pressure: 30.22 in.
Flight Rule: VFR
Wind Data
12 MPH
0° North
Cloud Level(s): Clear
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
21°
Feels like 10°F
Partly Cloudy
as of 3:55 PM CST
Rel. Humidity: 85%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.21 in.
Flight Rule: VFR
Wind Data
10 MPH
0° North
Cloud Level(s): Scattered at 1600ft
Increasing Clouds on Tonight Tonight... Increasing clouds, with a low around 4. Wind chill values as low as -7. North wind 5 to 10 mph becoming light northeast after midnight.

Partly Sunny on Monday Monday... Partly sunny, with a high near 22. Calm wind becoming southeast around 5 mph in the morning. Winds could gust as high as 10 mph.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a temperature falling to near 16 by 8pm, then rising to around 27 during the remainder of the night. South wind 5 to 15 mph, with gusts as high as 25 mph.

Mostly Cloudy on Tuesday Tuesday... Mostly cloudy, with a high near 36. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

60% chance of rain Tuesday Night Tuesday Night... Rain likely, mainly before midnight. Cloudy, with a low around 33. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

20% chance of rain & snow Wednesday Wednesday... A slight chance of rain and snow before 9am, then a slight chance of snow. Mostly cloudy, with a high near 34. Breezy. Chance of precipitation is 20%.

20% chance of snow Wednesday Night Wednesday Night... A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 17.

20% chance of snow Thursday Thursday... A chance of snow. Mostly cloudy, with a high near 24.

20% chance of snow Thursday Night Thursday Night... A chance of snow before midnight. Mostly cloudy, with a low around 7.

Mostly Cloudy on Friday Friday... Mostly cloudy, with a high near 15.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around -1.

Partly Sunny on Saturday Saturday... Partly sunny and cold, with a high near 8.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around -2.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 13.

Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:08 AM
Sunset: 4:26 PM
Civil Sunrise:06:37 AM
Civil Sunset: 4:57 PM
Nautical Sunrise: 06:02 AM
Nautical Sunset: 5:31 PM
Astro Sunrise: 05:29 AM
Astro Sunset: 6:05 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.