Deer Park, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Deer Park, IL in one place.
A chance of rain showers before 1pm, then showers and thunderstorms. Cloudy. High near 66, with temperatures falling to around 64 in the afternoon. Southeast wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
Local Weather Overview
This forecast page for Deer Park, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 15, 2026 1:34 PM CDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Deer Park, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 1:34 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Deer Park
Wednesday looks like the warmest upcoming period in Deer Park at 74 degrees F.
Friday Night is the coolest period ahead with temperatures near 34 degrees F.
The strongest winds are forecast for Tonight at about 5 to 20 mph W.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 1:34 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KLOT
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Scattered showers and thunderstorms before midnight. Cloudy. Low around 46, with temperatures rising to around 48 overnight. West wind 5 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Scattered rain showers after 10am. Mostly cloudy, with a high near 51. Northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Scattered rain showers before 7pm, then areas of frost. Mostly clear, with a low around 34. North wind 10 to 15 mph, with gusts as high as 35 mph. Chance of precipitation is 30%.
Widespread frost before 9am. Sunny, with a high near 56. West northwest wind around 5 mph.
Clear, with a low around 38.
Sunny, with a high near 62.
Mostly clear, with a low around 41.
Mostly sunny, with a high near 70.
Partly cloudy, with a low around 43.
Mostly sunny, with a high near 72.
Mostly clear, with a low around 46.
Sunny, with a high near 74.
Partly cloudy, with a low around 51.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Oct 15
|
Showers And Thunderstorms
|
66°F |
5 mph
SE
|
|
Tonight
Oct 15
|
Scattered Showers And Thunderstorms then Cloudy
|
46°F |
5 to 20 mph
W
|
|
Friday
Oct 16
|
Scattered Rain Showers
|
51°F |
15 to 20 mph
NW
|
|
Friday Night
Oct 16
|
Scattered Rain Showers then Areas Of Frost
|
34°F |
10 to 15 mph
N
|
|
Saturday
Oct 17
|
Widespread Frost then Sunny
|
56°F |
5 mph
WNW
|
|
Saturday Night
Oct 17
|
Clear
|
38°F |
5 mph
SSW
|
|
Sunday
Oct 18
|
Sunny
|
62°F |
10 to 15 mph
SSW
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
41°F |
0 to 5 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
70°F |
0 to 5 mph
SSW
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
43°F |
0 mph
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
72°F |
0 mph
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
46°F |
0 mph
|
|
Wednesday
Oct 21
|
Sunny
|
74°F |
0 to 5 mph
SSE
|
|
Wednesday Night
Oct 21
|
Partly Cloudy
|
51°F |
5 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Deer Park.