Brentwood, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Brentwood, IL in one place.
Sunny. High near 63, with temperatures falling to around 54 in the afternoon. West northwest wind 0 to 5 mph.
Local Weather Overview
This forecast page for Brentwood, 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: Nov 9, 2026 10:23 PM CST.
The active forecast window currently covers Nov 10 to Nov 16, 2026 for Brentwood, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Nov 10 to Nov 16, 2026
- Latest sync
- Nov 9, 2026 10:23 PM CST
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Brentwood
Tuesday looks like the warmest upcoming period in Brentwood at 63 degrees F.
Friday Night is the coolest period ahead with temperatures near 27 degrees F.
The strongest winds are forecast for Thursday at about 15 to 20 mph N.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Nov 9, 2026 10:23 PM CST
- 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
Mostly cloudy, with a low around 39. West wind around 0 mph.
A chance of rain. Mostly cloudy, with a high near 54. East northeast wind 0 to 10 mph. Chance of precipitation is 40%.
A slight chance of rain. Mostly cloudy, with a low around 37. North northwest wind 10 to 15 mph. Chance of precipitation is 20%.
A chance of rain. Mostly cloudy, with a high near 43. Chance of precipitation is 40%.
A slight chance of snow after midnight. Mostly cloudy, with a low around 30.
A slight chance of snow before noon, then a slight chance of rain and snow. Mostly sunny, with a high near 42.
Partly cloudy, with a low around 27.
Sunny, with a high near 45.
Mostly clear, with a low around 31.
Sunny, with a high near 48.
Partly cloudy, with a low around 35.
Mostly sunny, with a high near 55.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Nov 10
|
Sunny
|
63°F |
0 to 5 mph
WNW
|
|
Tuesday Night
Nov 10
|
Mostly Cloudy
|
39°F |
0 mph
|
|
Veterans Day
Nov 11
|
Chance Rain
|
54°F |
0 to 10 mph
ENE
|
|
Wednesday Night
Nov 11
|
Slight Chance Rain
|
37°F |
10 to 15 mph
NNW
|
|
Thursday
Nov 12
|
Chance Rain
|
43°F |
15 to 20 mph
N
|
|
Thursday Night
Nov 12
|
Mostly Cloudy then Slight Chance Snow
|
30°F |
10 to 15 mph
NNW
|
|
Friday
Nov 13
|
Slight Chance Snow
|
42°F |
10 mph
NNW
|
|
Friday Night
Nov 13
|
Partly Cloudy
|
27°F |
5 mph
NNW
|
|
Saturday
Nov 14
|
Sunny
|
45°F |
0 to 5 mph
NW
|
|
Saturday Night
Nov 14
|
Mostly Clear
|
31°F |
0 mph
|
|
Sunday
Nov 15
|
Sunny
|
48°F |
0 to 5 mph
SW
|
|
Sunday Night
Nov 15
|
Partly Cloudy
|
35°F |
0 to 5 mph
S
|
|
Monday
Nov 16
|
Mostly Sunny
|
55°F |
5 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Brentwood.