Westchester, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Westchester, IL in one place.
Sunny, with a high near 76. North wind around 10 mph, with gusts as high as 20 mph.
Local Weather Overview
This forecast page for Westchester, 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: Jul 21, 2026 3:21 AM CDT.
The active forecast window currently covers Jul 22 to Jul 27, 2026 for Westchester, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 22 to Jul 27, 2026
- Latest sync
- Jul 21, 2026 3:21 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Westchester
Sunday looks like the warmest upcoming period in Westchester at 92 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 59 degrees F.
The strongest winds are forecast for Sunday at about 5 to 15 mph WSW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 21, 2026 3:21 AM CDT
- Coverage
- 6 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 clear, with a low around 59. North wind 0 to 10 mph.
Sunny, with a high near 80.
Partly cloudy, with a low around 63.
Mostly sunny, with a high near 81.
Partly cloudy, with a low around 64.
Sunny, with a high near 86.
Mostly clear, with a low around 69.
Sunny, with a high near 92.
A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 72.
A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Jul 22
|
Sunny
|
76°F |
10 mph
N
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
59°F |
0 to 10 mph
N
|
|
Thursday
Jul 23
|
Sunny
|
80°F |
0 to 5 mph
SW
|
|
Thursday Night
Jul 23
|
Partly Cloudy
|
63°F |
0 to 5 mph
S
|
|
Friday
Jul 24
|
Mostly Sunny
|
81°F |
0 to 5 mph
S
|
|
Friday Night
Jul 24
|
Partly Cloudy
|
64°F |
0 to 5 mph
SSW
|
|
Saturday
Jul 25
|
Sunny
|
86°F |
0 to 10 mph
SSW
|
|
Saturday Night
Jul 25
|
Mostly Clear
|
69°F |
5 to 10 mph
SW
|
|
Sunday
Jul 26
|
Sunny
|
92°F |
5 to 15 mph
WSW
|
|
Sunday Night
Jul 26
|
Slight Chance Showers And Thunderstorms
|
72°F |
5 to 15 mph
WSW
|
|
Monday
Jul 27
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
90°F |
5 to 15 mph
WNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Westchester.