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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 12:20 pm CST Dec 26, 2025 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Saturday Sunday Monday Tuesday Wednesday New Year's Day
Cloudy on This Afternoon Fog on Tonight Fog on Saturday 80% chance of rain on Sunday 20% chance of snow on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday Partly Sunny on New Year's Day
High: 44 °F Low: 38°F High: 49°F High: 58°F High: 24°F High: 30°F High: 29°F High: 24°F
Low: 46°F Low: 18°F Low: 14°F Low: 21°F Low: 12°F  
Cloudy Fog Fog Rain Snow Mostly Sunny Partly Sunny Partly Sunny
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Current Conditions at
PERU - (KVYS)
46°
Feels like 40°F
Cloudy
as of 12:15 PM CST
Rel. Humidity: 100%
Dew Point: 46°F
Visibility: 7 Miles
Pressure: 29.76 in.
Flight Rule: IFR
Wind Data
13 MPH
300° Northwest
Cloud Level(s): Solid Overcast at 800ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
48°
Feels like 42°F
Cloudy
as of 12:15 PM CST
Rel. Humidity: 100%
Dew Point: 48°F
Visibility: 10 Miles
Pressure: 29.73 in.
Flight Rule: IFR
Wind Data
14 MPH
Gust: 18 MPH
320° Northwest
Cloud Level(s): Solid Overcast at 900ft
Current Conditions at
AURORA - (KARR)
46°
Feels like 40°F
Cloudy
Mist
as of 11:56 AM CST
Rel. Humidity: 93%
Dew Point: 45°F
Visibility: 5 Miles
Pressure: 29.72 in.
Flight Rule: IFR
Wind Data
13 MPH
320° Northwest
Cloud Level(s): Solid Overcast at 800ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
50°
Feels like 43°F
Cloudy
as of 12:15 PM CST
Rel. Humidity: 93%
Dew Point: 48°F
Visibility: 10 Miles
Pressure: 29.75 in.
Flight Rule: MVFR
Wind Data
18 MPH
Gust: 25 MPH
300° Northwest
Cloud Level(s): Solid Overcast at 1100ft
Cloudy on This Afternoon This Afternoon... Cloudy, with a temperature falling to around 44 by 5pm. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

Fog on Tonight Tonight... Areas of fog after 9pm. Otherwise, cloudy, with a low around 38. Northwest wind around 5 mph becoming calm in the evening.

Fog on Saturday Saturday... Areas of fog before noon. Otherwise, cloudy, with a high near 49. East southeast wind 5 to 10 mph, with gusts as high as 20 mph.

40% chance of rain Saturday Night Saturday Night... A 40 percent chance of showers, mainly after midnight. Cloudy, with a low around 46. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.

80% chance of rain Sunday Sunday... Showers. High near 58. Breezy, with a south wind 5 to 10 mph becoming west northwest 15 to 20 mph in the afternoon. Chance of precipitation is 80%.

50% chance of rain & snow Sunday Night Sunday Night... A chance of rain showers before 9pm, then a chance of rain and snow showers between 9pm and 3am, then a slight chance of snow showers after 3am. Cloudy, with a low around 18. Windy. Chance of precipitation is 50%.

20% chance of snow Monday Monday... A 20 percent chance of snow showers before noon. Partly sunny, with a high near 24. Windy.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 14. Blustery.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 30.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 21.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 29.

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

Partly Sunny on New Year's Day New Year's Day... Partly sunny, with a high near 24.

Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:20 AM
Sunset: 4:32 PM
Civil Sunrise:06:49 AM
Civil Sunset: 5:03 PM
Nautical Sunrise: 06:14 AM
Nautical Sunset: 5:38 PM
Astro Sunrise: 05:40 AM
Astro Sunset: 6:12 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.