Lake Forest, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Lake Forest, IL in one place.
Sunny. High near 75, with temperatures falling to around 73 in the afternoon. North wind 0 to 5 mph, with gusts as high as 15 mph.
Local Weather Overview
This forecast page for Lake Forest, 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: Aug 24, 2026 1:04 AM CDT.
The active forecast window currently covers Aug 24 to Aug 30, 2026 for Lake Forest, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 24 to Aug 30, 2026
- Latest sync
- Aug 24, 2026 1:04 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Lake Forest
Wednesday looks like the warmest upcoming period in Lake Forest at 83 degrees F.
Monday Night is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Wednesday at about 10 to 15 mph SW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 24, 2026 1:04 AM 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
Mostly clear, with a low around 57. South wind 0 to 5 mph.
Mostly sunny, with a high near 79. South southwest wind 0 to 10 mph.
Partly cloudy, with a low around 64. South wind 5 to 10 mph.
A chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 83. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 1am. Mostly clear, with a low around 63.
Sunny, with a high near 80.
Mostly clear, with a low around 62.
Mostly sunny, with a high near 78.
Partly cloudy, with a low around 62.
A slight chance of rain showers after 1pm. Mostly sunny, with a high near 79.
A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Aug 24
|
Sunny
|
75°F |
0 to 5 mph
N
|
|
Monday Night
Aug 24
|
Mostly Clear
|
57°F |
0 to 5 mph
S
|
|
Tuesday
Aug 25
|
Mostly Sunny
|
79°F |
0 to 10 mph
SSW
|
|
Tuesday Night
Aug 25
|
Partly Cloudy
|
64°F |
5 to 10 mph
S
|
|
Wednesday
Aug 26
|
Chance Showers And Thunderstorms
|
83°F |
10 to 15 mph
SW
|
|
Wednesday Night
Aug 26
|
Chance Showers And Thunderstorms
|
63°F |
5 to 10 mph
W
|
|
Thursday
Aug 27
|
Sunny
|
80°F |
5 mph
NW
|
|
Thursday Night
Aug 27
|
Mostly Clear
|
62°F |
0 to 5 mph
NW
|
|
Friday
Aug 28
|
Mostly Sunny
|
78°F |
0 to 5 mph
NNE
|
|
Friday Night
Aug 28
|
Partly Cloudy
|
62°F |
0 to 5 mph
ESE
|
|
Saturday
Aug 29
|
Mostly Sunny then Slight Chance Rain Showers
|
79°F |
0 to 5 mph
SSE
|
|
Saturday Night
Aug 29
|
Chance Showers And Thunderstorms
|
66°F |
5 mph
SSE
|
|
Sunday
Aug 30
|
Chance Rain Showers
|
81°F |
5 to 10 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Lake Forest.
