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Dayton, Illinois Weather Forecast
Dayton, Illinois Weather
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Weather Forecast for Dayton, Illinois : LaSalle County
Issued: 3:31 pm CST Dec 27, 2025 Latitude: 41.3847551 Longitude: -88.7942425 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Sunday Monday Tuesday Wednesday New Year's Day Friday
Cloudy on This Afternoon 60% chance of rain on Tonight 100% chance of thunderstorms on Sunday 30% chance of snow on Monday Mostly Sunny on Tuesday Mostly Cloudy on Wednesday Mostly Sunny on New Year's Day Mostly Sunny on Friday
High: 46°F Low: 51 °F High: 57°F High: 22°F High: 27°F High: 33°F High: 23°F High: 26°F
Low: 15°F Low: 12°F Low: 23°F Low: 16°F Low: 10°F  
Cloudy Rain Thunderstorms Snow Mostly Sunny Mostly Cloudy Mostly Sunny Mostly Sunny
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Current Conditions at
PERU - (KVYS)
45°
Feels like 37°F
Cloudy
Mist
as of 3:15 PM CST
Rel. Humidity: 100%
Dew Point: 45°F
Visibility: 5 Miles
Pressure: 29.87 in.
Flight Rule: LIFR
Wind Data
15 MPH
150° Southeast
Cloud Level(s): Solid Overcast at 400ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
45°
Feels like 38°F
Cloudy
as of 3:15 PM CST
Rel. Humidity: 100%
Dew Point: 45°F
Visibility: 7 Miles
Pressure: 29.90 in.
Flight Rule: IFR
Wind Data
12 MPH
150° Southeast
Cloud Level(s): Solid Overcast at 600ft
Current Conditions at
AURORA - (KARR)
43°
Feels like 36°F
Cloudy
Mist
as of 2:52 PM CST
Rel. Humidity: 93%
Dew Point: 41°F
Visibility: 4 Miles
Pressure: 29.89 in.
Flight Rule: IFR
Wind Data
13 MPH
150° Southeast
Cloud Level(s): Solid Overcast at 600ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
46°
Feels like 41°F
Cloudy
Mist
as of 3:15 PM CST
Rel. Humidity: 93%
Dew Point: 45°F
Visibility: 5 Miles
Pressure: 29.90 in.
Flight Rule: LIFR
Wind Data
10 MPH
150° Southeast
Cloud Level(s): Solid Overcast at 400ft
Cloudy on This Afternoon This Afternoon... Cloudy, with a high near 46. Southeast wind around 10 mph, with gusts as high as 20 mph.
60% chance of rain Tonight Tonight... Rain likely, mainly after 4am. Patchy fog. Otherwise, cloudy, with a temperature rising to around 51 by 2am. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
100% chance of thunderstorms Sunday Sunday... Rain and possibly a thunderstorm. Patchy fog before noon. High near 57. Breezy, with a south southeast wind 5 to 10 mph becoming west 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
60% chance of rain & snow Sunday Night Sunday Night... Rain likely before 7pm, then rain and snow likely between 7pm and 8pm, then snow likely after 8pm. Some thunder is also possible. Mostly cloudy, with a low around 15. Wind chill values as low as -5. Windy, with a west wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
30% chance of snow Monday Monday... A 30 percent chance of snow before noon. Mostly cloudy, with a high near 22. Windy, with a west northwest wind 25 to 30 mph, with gusts as high as 45 mph.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 12. Blustery.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 27.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 23.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 33.
20% chance of snow Wednesday Night Wednesday Night... A chance of snow before midnight. Mostly cloudy, with a low around 16.
Mostly Sunny on New Year's Day New Year's Day... Mostly sunny, with a high near 23.
Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 10.
Mostly Sunny on Friday Friday... Mostly sunny, with a high near 26.
Current Radar Image


Sun Almanac for Dayton, Illinois
Sunrise: 07:20 AM
Sunset: 4:33 PM
Civil Sunrise:06:49 AM
Civil Sunset: 5:04 PM
Nautical Sunrise: 06:14 AM
Nautical Sunset: 5:39 PM
Astro Sunrise: 05:41 AM
Astro Sunset: 6:12 PM
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