Winnetka, IL Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Winnetka, IL in one place.
Mostly sunny, with a high near 90. Heat index values as high as 99. Northwest wind 10 to 15 mph.
Local Weather Overview
This forecast page for Winnetka, 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 17, 2026 6:36 AM CDT.
The active forecast window currently covers Jul 18 to Jul 23, 2026 for Winnetka, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 18 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 6:36 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Winnetka
Saturday looks like the warmest upcoming period in Winnetka at 90 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 63 degrees F.
The strongest winds are forecast for Saturday at about 10 to 15 mph NW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 6:36 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
Partly cloudy, with a low around 68. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Sunny, with a high near 81.
Partly cloudy, with a low around 69.
A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87.
A slight chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely 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. Mostly sunny, with a high near 86.
Mostly clear, with a low around 65.
Sunny, with a high near 79.
Mostly clear, with a low around 63.
Sunny, with a high near 81.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Mostly Sunny
|
90°F |
10 to 15 mph
NW
|
|
Saturday Night
Jul 18
|
Partly Cloudy
|
68°F |
5 to 10 mph
NE
|
|
Sunday
Jul 19
|
Sunny
|
81°F |
5 mph
ENE
|
|
Sunday Night
Jul 19
|
Partly Cloudy
|
69°F |
5 mph
SE
|
|
Monday
Jul 20
|
Partly Sunny then Slight Chance Showers And Thunderstorms
|
87°F |
5 to 15 mph
SSW
|
|
Monday Night
Jul 20
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
72°F |
10 to 15 mph
WSW
|
|
Tuesday
Jul 21
|
Chance Showers And Thunderstorms then Mostly Sunny
|
86°F |
10 to 15 mph
WNW
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
65°F |
10 to 15 mph
NNW
|
|
Wednesday
Jul 22
|
Sunny
|
79°F |
10 mph
N
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
63°F |
0 to 10 mph
N
|
|
Thursday
Jul 23
|
Sunny
|
81°F |
5 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Winnetka.
