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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 3:06 am CST Jan 15, 2026 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Friday Saturday Sunday M.L.King Day Tuesday Wednesday
Increasing Clouds on Today 90% chance of snow on Tonight 40% chance of snow on Friday 20% chance of snow on Saturday Partly Sunny on Sunday Partly Sunny on M.L.King Day Mostly Sunny on Tuesday Partly Sunny on Wednesday
High: 26°F Low: 29 °F High: 36°F High: 16°F High: 17°F High: 14°F High: 19°F High: 27°F
Low: 13°F Low: 6°F Low: 7°F Low: 3°F Low: 12°F  
Increasing Clouds Snow Snow Snow Partly Sunny Partly Sunny Mostly Sunny Partly Sunny
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Current Conditions at
PERU - (KVYS)
16°
Feels like 4°F
Clear
as of 4:19 AM CST
Rel. Humidity: 66%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: VFR
Wind Data
9 MPH
320° Northwest
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
18°
Cloudy
as of 4:15 AM CST
Rel. Humidity: 61%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 30.03 in.
Flight Rule: MVFR
Wind Data
8 MPH
350° North
Cloud Level(s): Solid Overcast at 3000ft
Current Conditions at
AURORA - (KARR)
16°
Feels like 1°F
Cloudy
as of 3:52 AM CST
Rel. Humidity: 66%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: VFR
Wind Data
14 MPH
340° North
Cloud Level(s): Solid Overcast at 3200ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
16°
Feels like 2°F
Cloudy
as of 4:15 AM CST
Rel. Humidity: 66%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 30.05 in.
Flight Rule: VFR
Wind Data
12 MPH
320° Northwest
Cloud Level(s): Solid Overcast at 3200ft
Increasing Clouds on Today Today... Increasing clouds, with a high near 26. Wind chill values as low as 1. North northwest wind 5 to 10 mph becoming south southwest in the afternoon. Winds could gust as high as 20 mph.

90% chance of snow Tonight Tonight... Snow. Temperature rising to around 29 by 5am. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

40% chance of snow Friday Friday... A 40 percent chance of snow showers, mainly after noon. Mostly cloudy, with a high near 36. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

40% chance of snow Friday Night Friday Night... A 40 percent chance of snow. Mostly cloudy, with a low around 13. Wind chill values as low as 1. West northwest wind around 15 mph, with gusts as high as 25 mph.

20% chance of snow Saturday Saturday... A 20 percent chance of snow after noon. Mostly cloudy, with a high near 16. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 6.

Partly Sunny on Sunday Sunday... Partly sunny, with a high near 17.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 7.

Partly Sunny on M.L.King Day M.L.King Day... Partly sunny, with a high near 14. Blustery.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 3.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 19.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 12.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 27.

Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:19 AM
Sunset: 4:51 PM
Civil Sunrise:06:48 AM
Civil Sunset: 5:21 PM
Nautical Sunrise: 06:14 AM
Nautical Sunset: 5:55 PM
Astro Sunrise: 05:41 AM
Astro Sunset: 6:28 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.