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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: 3:11 pm CST Dec 27, 2025 Latitude: 41.2950348 Longitude: -89.0361928 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Sunday Monday Tuesday Wednesday New Year's Day Friday
Cloudy on This Afternoon 60% chance of rain on Tonight 90% chance of thunderstorms on Sunday 20% chance of snow on Monday Mostly Sunny on Tuesday Mostly Cloudy on Wednesday Mostly Sunny on New Year's Day Mostly Sunny on Friday
High: 46°F Low: 52 °F High: 57°F High: 22°F High: 27°F High: 33°F High: 23°F High: 27°F
Low: 15°F Low: 11°F Low: 23°F Low: 16°F Low: 10°F  
Cloudy Rain Thunderstorms Snow Mostly Sunny Mostly Cloudy Mostly Sunny Mostly Sunny
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Current Conditions at
PERU - (KVYS)
45°
Feels like 38°F
Cloudy
Mist
as of 2:55 PM CST
Rel. Humidity: 100%
Dew Point: 45°F
Visibility: 5 Miles
Pressure: 29.87 in.
Flight Rule: LIFR
Wind Data
13 MPH
140° Southeast
Cloud Level(s): Solid Overcast at 400ft
Current Conditions at
LACON/MARSHALL COUNTY - (KC75)
45°
Feels like 39°F
Cloudy
as of 2:55 PM CST
Rel. Humidity: 87%
Dew Point: 41°F
Visibility: 7 Miles
Pressure: 29.85 in.
Flight Rule: IFR
Wind Data
10 MPH
150° Southeast
Cloud Level(s): Solid Overcast at 700ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
45°
Feels like 39°F
Cloudy
as of 2:55 PM CST
Rel. Humidity: 100%
Dew Point: 45°F
Visibility: 7 Miles
Pressure: 29.89 in.
Flight Rule: IFR
Wind Data
10 MPH
150° Southeast
Cloud Level(s): Solid Overcast at 600ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
46°
Feels like 41°F
Cloudy
Mist
as of 2:55 PM CST
Rel. Humidity: 93%
Dew Point: 45°F
Visibility: 3 Miles
Pressure: 29.90 in.
Flight Rule: LIFR
Wind Data
12 MPH
150° Southeast
Cloud Level(s): Solid Overcast at 400ft
Cloudy on This Afternoon This Afternoon... Cloudy, with a high near 46. Southeast wind around 10 mph, with gusts as high as 15 mph.
60% chance of rain Tonight Tonight... Rain likely, mainly after 4am. Patchy fog. Otherwise, cloudy, with a temperature rising to around 52 by 3am. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
90% chance of thunderstorms Sunday Sunday... Rain and possibly a thunderstorm. Patchy fog before noon. High near 57. Breezy, with a south wind 5 to 10 mph becoming west 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
60% chance of rain & snow Sunday Night Sunday Night... Rain likely before 7pm, then snow likely. Some thunder is also possible. Mostly cloudy, with a low around 15. Wind chill values as low as -5. Windy, with a west wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
20% chance of snow Monday Monday... A 20 percent chance of snow before noon. Mostly cloudy, with a high near 22. Windy, with a west northwest wind 25 to 30 mph, with gusts as high as 45 mph.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 11. Blustery.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 27.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 23.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 33.
20% chance of snow Wednesday Night Wednesday Night... A chance of snow before midnight. Mostly cloudy, with a low around 16.
Mostly Sunny on New Year's Day New Year's Day... Mostly sunny, with a high near 23.
Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 10.
Mostly Sunny on Friday Friday... Mostly sunny, with a high near 27.
Current Radar Image


Sun Almanac for Deer Park, Illinois
Sunrise: 07:21 AM
Sunset: 4:34 PM
Civil Sunrise:06:50 AM
Civil Sunset: 5:05 PM
Nautical Sunrise: 06:15 AM
Nautical Sunset: 5:40 PM
Astro Sunrise: 05:41 AM
Astro Sunset: 6:13 PM
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