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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 2:41 pm CST Jan 15, 2026 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
Tonight Friday Saturday Sunday M.L.King Day Tuesday Wednesday Thursday
80% chance of snow on Tonight 50% chance of snow on Friday 20% chance of snow on Saturday Partly Sunny on Sunday Mostly Sunny on M.L.King Day Mostly Sunny on Tuesday Partly Sunny on Wednesday Mostly Sunny on Thursday
Low: 27 °F High: 36°F High: 18°F High: 20°F High: 11°F High: 22°F High: 28°F High: 29°F
Low: 15°F Low: 8 °F Low: 4 °F Low: 3°F Low: 16°F Low: 12°F  
Snow Snow Snow Partly Sunny Mostly Sunny Mostly Sunny Partly Sunny Mostly Sunny
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Current Conditions at
PERU - (KVYS)
Clear
as of 3:55 PM CST
Visibility: 10 Miles
Pressure: 29.87 in.
Flight Rule: VFR
Wind Data
13 MPH
Gust: 16 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
25°
Feels like 15°F
Partly Cloudy
as of 4:15 PM CST
Rel. Humidity: 53%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 29.86 in.
Flight Rule: VFR
Wind Data
9 MPH
230° Southwest
Cloud Level(s): Scattered at 11000ft
Current Conditions at
AURORA - (KARR)
25°
Feels like 15°F
Mostly Clear
as of 3:52 PM CST
Rel. Humidity: 53%
Dew Point: 10°F
Visibility: 9 Miles
Pressure: 29.85 in.
Flight Rule: VFR
Wind Data
9 MPH
230° Southwest
Cloud Level(s): Few at 11000ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
25°
Feels like 14°F
Clear
as of 4:15 PM CST
Rel. Humidity: 49%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 29.89 in.
Flight Rule: VFR
Wind Data
10 MPH
220° Southwest
Cloud Level(s): Clear
80% chance of snow Tonight Tonight... Snow. Temperature rising to around 27 by 4am. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of around an inch possible.

50% chance of snow Friday Friday... A 50 percent chance of snow. Mostly cloudy, with a high near 36. South southwest wind around 15 mph becoming west in the afternoon. Winds could gust as high as 30 mph.

30% chance of snow Friday Night Friday Night... A 30 percent chance of snow showers, mainly before midnight. Mostly cloudy, with a low around 15. Wind chill values as low as 1. West northwest wind around 15 mph, with gusts as high as 20 mph.

20% chance of snow Saturday Saturday... A chance of flurries before noon, then a slight chance of snow showers after noon. Partly sunny, with a high near 18. Wind chill values as low as zero. Breezy, with a west wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

20% chance of snow Saturday Night Saturday Night... A chance of flurries before midnight. Mostly cloudy, with a low around 8. West wind 10 to 15 mph, with gusts as high as 25 mph.

Partly Sunny on Sunday Sunday... Partly sunny, with a high near 20.

20% chance of snow Sunday Night Sunday Night... A chance of flurries before midnight. Mostly cloudy, with a low around 4. Blustery.

Mostly Sunny on M.L.King Day M.L.King Day... Mostly sunny, with a high near 11. 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 22.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 16.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 28.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 12.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 29.

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.