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Deer Park, Illinois Weather Forecast
Deer Park, Illinois Weather
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Weather Forecast for Deer Park, Illinois : LaSalle County
Issued: 7:21 am CST Jan 7, 2026 Latitude: 41.2950348 Longitude: -89.0361928 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Thursday Friday Saturday Sunday Monday Tuesday
Fog on Today Increasing Clouds on Tonight 90% chance of rain on Thursday 20% chance of rain on Friday 60% chance of rain & snow on Saturday Partly Sunny on Sunday Mostly Sunny on Monday Mostly Sunny on Tuesday
High: 49°F Low: 39°F High: 58°F High: 49°F High: 39°F High: 29°F High: 39°F High: 41°F
Low: 44°F Low: 36°F Low: 21°F Low: 20°F Low: 28°F  
Fog Increasing Clouds Rain Rain Rain & Snow Partly Sunny Mostly Sunny Mostly Sunny
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Current Conditions at
PERU - (KVYS)
32°
Cloudy
Mist
as of 7:59 AM CST
Rel. Humidity: 100%
Dew Point: 32°F
Visibility: 1/2 Miles
Pressure: 29.93 in.
Flight Rule: LIFR
Wind Data
7 MPH
190° South
Cloud Level(s): Solid Overcast at 200ft
Current Conditions at
LACON/MARSHALL COUNTY - (KC75)
32°
Cloudy
Mist
as of 7:55 AM CST
Rel. Humidity: 92%
Dew Point: 30°F
Visibility: 1 3/4 Miles
Pressure: 29.93 in.
Flight Rule: LIFR
Wind Data
5 MPH
220° Southwest
Cloud Level(s): Solid Overcast at 300ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
32°
Cloudy
Mist
as of 7:55 AM CST
Rel. Humidity: 100%
Dew Point: 32°F
Visibility: 1 1/4 Miles
Pressure: 29.93 in.
Flight Rule: IFR
Wind Data
6 MPH
240° Southwest
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
34°
Cloudy
Mist
as of 7:55 AM CST
Rel. Humidity: 93%
Dew Point: 32°F
Visibility: 1 3/4 Miles
Pressure: 29.93 in.
Flight Rule: LIFR
Wind Data
5 MPH
220° Southwest
Cloud Level(s): Solid Overcast at 200ft
Fog on Today Today... Areas of dense fog before noon. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 49. South wind 5 to 10 mph.
Increasing Clouds on Tonight Tonight... Increasing clouds, with a low around 39. South wind around 10 mph.
90% chance of rain Thursday Thursday... Rain, mainly after noon. High near 58. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
90% chance of thunderstorms Thursday Night Thursday Night... Rain and possibly a thunderstorm before midnight, then a chance of rain and thunderstorms between midnight and 3am, then a chance of rain after 3am. Low around 44. South southeast wind around 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%.
20% chance of rain Friday Friday... A 20 percent chance of rain. Mostly cloudy, with a high near 49. West wind 10 to 15 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph.
50% chance of rain Friday Night Friday Night... A 50 percent chance of rain after midnight. Mostly cloudy, with a low around 36.
60% chance of rain & snow Saturday Saturday... Rain likely, possibly mixed with snow, mainly before noon. Mostly cloudy, with a high near 39. Chance of precipitation is 60%.
20% chance of snow Saturday Night Saturday Night... A chance of snow. Mostly cloudy, with a low around 21.
Partly Sunny on Sunday Sunday... Partly sunny, with a high near 29.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 20.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 39.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 28.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 41.
Current Radar Image


Sun Almanac for Deer Park, Illinois
Sunrise: 07:22 AM
Sunset: 4:43 PM
Civil Sunrise:06:51 AM
Civil Sunset: 5:14 PM
Nautical Sunrise: 06:17 AM
Nautical Sunset: 5:49 PM
Astro Sunrise: 05:43 AM
Astro Sunset: 6:22 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.