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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: 5:55 am CST Jan 20, 2026 Latitude: 41.2950348 Longitude: -89.0361928 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Wednesday Thursday Friday Saturday Sunday Monday
Increasing Clouds on Today 50% chance of snow on Tonight 20% chance of snow on Wednesday Mostly Sunny on Thursday Mostly Sunny on Friday Mostly Cloudy on Saturday Mostly Sunny on Sunday Sunny on Monday
High: 26°F Low: 27 °F High: 31°F High: 24°F High: 2°F High: 7°F High: 18°F High: 20°F
Low: 15°F Low: -5°F Low: -6°F Low: 0°F Low: 2°F  
Increasing Clouds Snow Snow Mostly Sunny Mostly Sunny Mostly Cloudy Mostly Sunny Sunny
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Current Conditions at
PERU - (KVYS)
Clear
as of 6:39 AM CST
Rel. Humidity: 77%
Dew Point: -2°F
Visibility: 10 Miles
Pressure: 30.37 in.
Flight Rule: VFR
Wind Data
6 MPH
210° Southwest
Cloud Level(s): Clear
Current Conditions at
LACON/MARSHALL COUNTY - (KC75)
Clear
as of 6:35 AM CST
Rel. Humidity: 77%
Dew Point: -4°F
Visibility: 10 Miles
Pressure: 30.39 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
Clear
as of 6:35 AM CST
Rel. Humidity: 71%
Dew Point: -4°F
Visibility: 10 Miles
Pressure: 30.37 in.
Flight Rule: VFR
Wind Data
5 MPH
240° Southwest
Cloud Level(s): Clear
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
Clear
as of 6:35 AM CST
Rel. Humidity: 71%
Dew Point: -4°F
Visibility: 10 Miles
Pressure: 30.40 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Increasing Clouds on Today Today... Increasing clouds, with a high near 26. Wind chill values as low as -7. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

50% chance of snow Tonight Tonight... A 50 percent chance of snow, mainly after midnight. Cloudy, with a temperature rising to around 27 by 3am. South southeast wind 5 to 15 mph becoming southwest after midnight. Winds could gust as high as 20 mph.

20% chance of snow Wednesday Wednesday... A 20 percent chance of snow before 9am. Mostly sunny, with a high near 31. West wind around 15 mph, with gusts as high as 25 mph.

40% chance of snow Wednesday Night Wednesday Night... A 40 percent chance of snow showers before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 15. Wind chill values as low as 1. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 24. West wind 10 to 15 mph, with gusts as high as 25 mph.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around -5.

Mostly Sunny on Friday Friday... Mostly sunny and cold, with a high near 2.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around -6.

Mostly Cloudy on Saturday Saturday... Mostly cloudy and cold, with a high near 7.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 0.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 18.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 2.

Sunny on Monday Monday... Sunny, with a high near 20.

Current Radar Image


Sun Almanac for Deer Park, Illinois
Sunrise: 07:17 AM
Sunset: 4:58 PM
Civil Sunrise:06:47 AM
Civil Sunset: 5:28 PM
Nautical Sunrise: 06:13 AM
Nautical Sunset: 6:01 PM
Astro Sunrise: 05:40 AM
Astro Sunset: 6:34 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.