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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: 12:11 am CST Jan 7, 2026 Latitude: 41.2950348 Longitude: -89.0361928 View on Google Maps

MouseOver for Detail Forecast
Overnight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
Fog on Overnight Fog on Wednesday 90% chance of rain on Thursday 20% chance of rain on Friday 20% chance of rain & snow on Saturday Mostly Sunny on Sunday Mostly Sunny on Monday Partly Sunny on Tuesday
Low: 34°F High: 50°F High: 53°F High: 45°F High: 39°F High: 31°F High: 41°F High: 40°F
Low: 39°F Low: 43°F Low: 35°F Low: 23°F Low: 24°F Low: 28°F  
Fog Fog Rain Rain Rain & Snow Mostly Sunny Mostly Sunny Partly Sunny
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Current Conditions at
PERU - (KVYS)
36°
Feels like 28°F
Cloudy
Mist
as of 12:19 AM CST
Rel. Humidity: 100%
Dew Point: 36°F
Visibility: 3 Miles
Pressure: 29.83 in.
Flight Rule: LIFR
Wind Data
10 MPH
280° West
Cloud Level(s): Solid Overcast at 200ft
Current Conditions at
LACON/MARSHALL COUNTY - (KC75)
37°
Cloudy
Mist
as of 12:15 AM CST
Rel. Humidity: 86%
Dew Point: 34°F
Visibility: 5 Miles
Pressure: 29.84 in.
Flight Rule: IFR
Wind Data
6 MPH
260° West
Cloud Level(s): Solid Overcast at 700ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
37°
Feels like 30°F
Cloudy
Mist
as of 12:15 AM CST
Rel. Humidity: 93%
Dew Point: 36°F
Visibility: 5 Miles
Pressure: 29.81 in.
Flight Rule: IFR
Wind Data
10 MPH
280° West
Cloud Level(s): Solid Overcast at 600ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
37°
Feels like 28°F
Cloudy
as of 12:15 AM CST
Rel. Humidity: 93%
Dew Point: 36°F
Pressure: 29.84 in.
Wind Data
14 MPH
270° West
Cloud Level(s): Solid Overcast at 600ft
Fog on Overnight Overnight... Patchy dense fog. Otherwise, cloudy, with a low around 34. West wind 5 to 10 mph.

Fog on Wednesday Wednesday... Areas of dense fog before noon. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 50. West wind 5 to 10 mph becoming south in the afternoon.

Increasing Clouds on Wednesday Night Wednesday Night... Increasing clouds, with a low around 39. South wind around 10 mph.

90% chance of rain Thursday Thursday... Rain, mainly after noon. High near 53. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.

70% chance of rain Thursday Night Thursday Night... Rain likely, mainly before midnight. Mostly cloudy, with a low around 43. South southeast wind around 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.

20% chance of rain Friday Friday... A 20 percent chance of rain. Mostly cloudy, with a high near 45.

50% chance of rain Friday Night Friday Night... A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 35.

20% chance of rain & snow Saturday Saturday... A chance of rain before noon, then a chance of snow. Mostly cloudy, with a high near 39.

20% chance of snow Saturday Night Saturday Night... A chance of snow before midnight. Mostly cloudy, with a low around 23.

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 41.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 28.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 40.

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.