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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 1:35 pm CST Jan 2, 2026 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Saturday Sunday Monday Tuesday Wednesday Thursday
Mostly Cloudy on This Afternoon Mostly Cloudy on Tonight Partly Sunny on Saturday Mostly Sunny on Sunday Mostly Sunny on Monday Mostly Sunny on Tuesday Mostly Sunny on Wednesday 20% chance of rain on Thursday
High: 26°F Low: 20°F High: 31°F High: 31°F High: 45°F High: 50°F High: 50°F High: 52°F
Low: 17°F Low: 27°F Low: 34°F Low: 32°F Low: 38°F  
Mostly Cloudy Mostly Cloudy Partly Sunny Mostly Sunny Mostly Sunny Mostly Sunny Mostly Sunny Rain
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Current Conditions at
PERU - (KVYS)
27°
Partly Cloudy
as of 1:35 PM CST
Rel. Humidity: 63%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: VFR
Wind Data
6 MPH
040° Northeast
Cloud Level(s): Scattered at 2500ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
25°
Clear
as of 1:35 PM CST
Rel. Humidity: 62%
Dew Point: 14°F
Visibility: 10 Miles
Pressure: 29.96 in.
Flight Rule: VFR
Wind Data
6 MPH
340° North
Cloud Level(s): Clear
Current Conditions at
AURORA - (KARR)
19°
Feels like 8°F
Clear
as of 12:52 PM CST
Rel. Humidity: 67%
Dew Point: 10°F
Visibility: 8 Miles
Pressure: 29.96 in.
Flight Rule: VFR
Wind Data
9 MPH
330° Northwest
Cloud Level(s): Clear
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
27°
Mostly Cloudy
as of 1:35 PM CST
Rel. Humidity: 63%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 29.96 in.
Flight Rule: MVFR
Wind Data
7 MPH
0° North
Cloud Level(s): Broken at 2200ft
Mostly Cloudy on This Afternoon This Afternoon... Mostly cloudy, with a high near 26. North wind around 5 mph.

Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 20. North wind around 5 mph becoming calm in the evening.

Partly Sunny on Saturday Saturday... Partly sunny, with a high near 31. Calm wind becoming west northwest around 5 mph in the afternoon. Winds could gust as high as 10 mph.

Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 17. Northwest wind around 5 mph becoming calm after midnight. Winds could gust as high as 10 mph.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 31. Calm wind becoming south southeast around 5 mph in the afternoon. Winds could gust as high as 10 mph.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 27.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 45.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 34.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 50.

Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 32.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 50.

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

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

Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:21 AM
Sunset: 4:37 PM
Civil Sunrise:06:50 AM
Civil Sunset: 5:08 PM
Nautical Sunrise: 06:16 AM
Nautical Sunset: 5:43 PM
Astro Sunrise: 05:42 AM
Astro Sunset: 6:17 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.