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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: 12:20 pm CST Dec 26, 2025 Latitude: 41.2950348 Longitude: -89.0361928 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 Morning Fog on Saturday 80% chance of rain on Sunday Partly Sunny on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday Partly Sunny on New Year's Day
High: 50°F Low: 39°F High: 50°F High: 58°F High: 24°F High: 31°F High: 29°F High: 24°F
Low: 47°F Low: 18°F Low: 14°F Low: 21°F Low: 12°F  
Cloudy Fog Morning Fog Rain Partly Sunny Mostly Sunny Partly Sunny Partly Sunny
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Current Conditions at
PERU - (KVYS)
46°
Feels like 40°F
Cloudy
as of 1:15 PM CST
Rel. Humidity: 100%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 29.78 in.
Flight Rule: IFR
Wind Data
14 MPH
290° West
Cloud Level(s): Solid Overcast at 800ft
Current Conditions at
LACON/MARSHALL COUNTY - (KC75)
48°
Feels like 43°F
Cloudy
as of 1:15 PM CST
Rel. Humidity: 81%
Dew Point: 43°F
Visibility: 10 Miles
Pressure: 29.79 in.
Flight Rule: IFR
Wind Data
10 MPH
310° Northwest
Cloud Level(s): Solid Overcast at 900ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
46°
Feels like 40°F
Cloudy
as of 1:35 PM CST
Rel. Humidity: 100%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 29.75 in.
Flight Rule: MVFR
Wind Data
13 MPH
320° Northwest
Cloud Level(s): Solid Overcast at 1100ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
50°
Feels like 44°F
Cloudy
as of 1:15 PM CST
Rel. Humidity: 87%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 29.76 in.
Flight Rule: MVFR
Wind Data
16 MPH
Gust: 22 MPH
300° Northwest
Cloud Level(s): Solid Overcast at 1100ft
Cloudy on This Afternoon This Afternoon... Cloudy, with a high near 50. 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 39. Northwest wind around 5 mph becoming calm in the evening.
Morning Fog on Saturday Saturday... Areas of fog before 11am. Otherwise, cloudy, with a high near 50. 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 47. South southeast wind 10 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. Winds could gust as high as 25 mph. 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 midnight, then a slight chance of snow showers after midnight. Mostly cloudy, with a low around 18. Windy. Chance of precipitation is 50%.
Partly Sunny on Monday Monday... 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 31.
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 Deer Park, Illinois
Sunrise: 07:21 AM
Sunset: 4:33 PM
Civil Sunrise:06:50 AM
Civil Sunset: 5:04 PM
Nautical Sunrise: 06:15 AM
Nautical Sunset: 5:39 PM
Astro Sunrise: 05:41 AM
Astro Sunset: 6:13 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.