Lake County, IL Weather Forecast
County weather hub
Mostly Sunny
Compare major city weather across Lake County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly sunny, with a high near 66.
County Weather Overview
This county weather page brings together forecast coverage for Lake County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 30 of 30 mapped cities in Lake County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 8 to Oct 11, 2026
- Latest sync
- Oct 5, 2026 4:20 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Lake County
Sunday looks like the warmest upcoming period in Lake County at 73 degrees F.
Thursday Night is the coolest period ahead with temperatures near 46 degrees F.
The strongest winds are forecast for Thursday at about 5 to 10 mph NW.
The forecast from Oct 8 through Oct 11 stays mostly dry.
Forecast Details
- Last updated
- Oct 5, 2026 4:20 PM CDT
- Coverage
- 4 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 46.
Mostly sunny, with a high near 66.
Partly cloudy, with a low around 48.
Sunny, with a high near 69.
Mostly clear, with a low around 56.
Mostly sunny, with a high near 73.
Partly cloudy, with a low around 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 8
|
Mostly Sunny
|
66°F |
5 to 10 mph
NW
|
|
Thursday Night
Oct 8
|
Partly Cloudy
|
46°F |
0 to 5 mph
NW
|
|
Friday
Oct 9
|
Mostly Sunny
|
66°F |
0 to 5 mph
SW
|
|
Friday Night
Oct 9
|
Partly Cloudy
|
48°F |
0 to 5 mph
SSE
|
|
Saturday
Oct 10
|
Sunny
|
69°F |
5 to 10 mph
SSE
|
|
Saturday Night
Oct 10
|
Mostly Clear
|
56°F |
10 mph
S
|
|
Sunday
Oct 11
|
Mostly Sunny
|
73°F |
10 mph
SSW
|
|
Sunday Night
Oct 11
|
Partly Cloudy
|
54°F |
5 mph
SSW
|
Major City Forecasts
Live forecast snapshots for major cities across Lake County.
Coverage
Forecast coverage currently spans 30 of 30 mapped cities in Lake County.
Largest mapped city population in this region: 85,453.
