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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 5:06 pm CST Jan 4, 2026 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
Tonight Monday Tuesday Wednesday Thursday Friday Saturday Sunday
Clearing on Tonight Mostly Cloudy on Monday Patchy Fog on Tuesday Mostly Sunny on Wednesday 20% chance of rain on Thursday 20% chance of rain on Friday 20% chance of rain & snow on Saturday Mostly Sunny on Sunday
Low: 31°F High: 43°F High: 49°F High: 52°F High: 52°F High: 44°F High: 35°F High: 31°F
Low: 36°F Low: 32°F Low: 38°F Low: 37°F Low: 30°F Low: 19°F  
Clearing Mostly Cloudy Patchy Fog Mostly Sunny Rain Rain Rain & Snow Mostly Sunny
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Current Conditions at
PERU - (KVYS)
34°
Feels like 24°F
Clear
as of 7:15 PM CST
Rel. Humidity: 74%
Dew Point: 27°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: VFR
Wind Data
13 MPH
150° Southeast
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
32°
Feels like 24°F
Clear
as of 7:15 PM CST
Rel. Humidity: 80%
Dew Point: 27°F
Visibility: 10 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
9 MPH
160° South
Cloud Level(s): Clear
Current Conditions at
AURORA - (KARR)
30°
Feels like 20°F
Clear
as of 6:52 PM CST
Rel. Humidity: 80%
Dew Point: 25°F
Visibility: 8 Miles
Pressure: 29.98 in.
Flight Rule: VFR
Wind Data
12 MPH
160° South
Cloud Level(s): Clear
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
34°
Feels like 25°F
Clear
as of 7:15 PM CST
Rel. Humidity: 69%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
10 MPH
Gust: 16 MPH
150° Southeast
Cloud Level(s): Clear
Clearing on Tonight Tonight... Cloudy during the early evening, then gradual clearing, with a low around 31. South wind 10 to 15 mph, with gusts as high as 20 mph.

Mostly Cloudy on Monday Monday... Mostly cloudy, with a high near 43. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

Patchy Fog on Monday Night Monday Night... Patchy fog. Otherwise, mostly cloudy, with a low around 36. South southeast wind around 5 mph, with gusts as high as 10 mph.

Patchy Fog on Tuesday Tuesday... Patchy fog before noon. Otherwise, mostly cloudy, with a high near 49. South wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 15 mph.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 32. West wind around 5 mph, with gusts as high as 15 mph.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 52.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 38.

20% chance of rain Thursday Thursday... A chance of rain after noon. Mostly cloudy, with a high near 52.

70% chance of rain Thursday Night Thursday Night... Rain likely, mainly before midnight. Mostly cloudy, with a low around 37.

20% chance of rain Friday Friday... A chance of rain. Mostly cloudy, with a high near 44.

20% chance of rain Friday Night Friday Night... A chance of rain. Mostly cloudy, with a low around 30.

20% chance of rain & snow Saturday Saturday... A chance of rain and snow. Mostly cloudy, with a high near 35.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 19.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 31.

Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:21 AM
Sunset: 4:39 PM
Civil Sunrise:06:50 AM
Civil Sunset: 5:10 PM
Nautical Sunrise: 06:16 AM
Nautical Sunset: 5:45 PM
Astro Sunrise: 05:42 AM
Astro Sunset: 6:18 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.