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Deer Park, Illinois Weather Forecast
Deer Park, Illinois Weather
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Click for Special Weather Statement for Deer Park, Illinois
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Weather Forecast for Deer Park, Illinois : LaSalle County
Issued: 4:26 am CST Jan 9, 2026 Latitude: 41.2950348 Longitude: -89.0361928 View on Google Maps

MouseOver for Detail Forecast
Overnight Friday Saturday Sunday Monday Tuesday Wednesday Thursday
Mostly Cloudy on Overnight Partly Sunny on Friday 50% chance of rain & snow on Saturday Mostly Sunny on Sunday Mostly Sunny on Monday 20% chance of rain on Tuesday 20% chance of snow on Wednesday Mostly Sunny on Thursday
Low: 45°F High: 45°F High: 37°F High: 31°F High: 42°F High: 47°F High: 35°F High: 31°F
Low: 32°F Low: 21°F Low: 24°F Low: 35°F Low: 33°F Low: 21°F  
Mostly Cloudy Partly Sunny Rain & Snow Mostly Sunny Mostly Sunny Rain Snow Mostly Sunny
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Current Conditions at
PERU - (KVYS)
43°
Feels like 33°F
Cloudy
as of 4:59 AM CST
Rel. Humidity: 86%
Dew Point: 39°F
Visibility: 7 Miles
Pressure: 29.59 in.
Flight Rule: MVFR
Wind Data
25 MPH
Gust: 36 MPH
240° Southwest
Cloud Level(s): Solid Overcast at 1100ft
Current Conditions at
LACON/MARSHALL COUNTY - (KC75)
43°
Feels like 34°F
Cloudy
as of 4:55 AM CST
Rel. Humidity: 75%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 29.65 in.
Flight Rule: MVFR
Wind Data
21 MPH
Gust: 24 MPH
250° West
Cloud Level(s): Solid Overcast at 1800ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
43°
Feels like 31°F
Cloudy
as of 4:55 AM CST
Rel. Humidity: 86%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 29.56 in.
Flight Rule: MVFR
Wind Data
35 MPH
Gust: 45 MPH
260° West
Cloud Level(s): Solid Overcast at 1500ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
45°
Feels like 36°F
Cloudy
as of 4:55 AM CST
Rel. Humidity: 81%
Dew Point: 39°F
Pressure: 29.63 in.
Wind Data
22 MPH
Gust: 36 MPH
250° West
Cloud Level(s): Solid Overcast at 1300ft
Mostly Cloudy on Overnight Overnight... Patchy drizzle with isolated sprinkles. Mostly cloudy, with a steady temperature around 45. Breezy, with a west southwest wind around 25 mph, with gusts as high as 40 mph.
Partly Sunny on Friday Friday... Patchy drizzle with isolated sprinkles before 9am. Partly sunny, with a high near 45. Breezy, with a west wind 15 to 25 mph becoming northwest 5 to 10 mph in the afternoon. Winds could gust as high as 40 mph.
40% chance of rain & snow Friday Night Friday Night... A chance of rain after 2am, mixing with snow after 4am. Increasing clouds, with a low around 32. North wind around 5 mph becoming east in the evening. Chance of precipitation is 40%.
50% chance of rain & snow Saturday Saturday... A chance of rain and snow before noon, then a chance of snow showers between noon and 3pm, then a chance of rain and snow showers after 3pm. Mostly cloudy, with a high near 37. Breezy, with a west wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 50%.
20% chance of snow Saturday Night Saturday Night... A 20 percent chance of snow showers. Mostly cloudy, with a low around 21. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 31.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 24.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 42.
Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 35.
20% chance of rain Tuesday Tuesday... A chance of showers after noon. Mostly cloudy, with a high near 47.
20% chance of rain Tuesday Night Tuesday Night... A chance of showers. Mostly cloudy, with a low around 33.
20% chance of snow Wednesday Wednesday... A chance of snow showers. Partly sunny, with a high near 35.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 21.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 31.
Current Radar Image


Sun Almanac for Deer Park, Illinois
Sunrise: 07:22 AM
Sunset: 4:45 PM
Civil Sunrise:06:51 AM
Civil Sunset: 5:16 PM
Nautical Sunrise: 06:16 AM
Nautical Sunset: 5:50 PM
Astro Sunrise: 05:43 AM
Astro Sunset: 6:24 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.