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 59.
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
- May 10 to May 14, 2026
- Latest sync
- May 8, 2026 3:19 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Lake County
Thursday looks like the warmest upcoming period in Lake County at 71 degrees F.
Sunday Night is the coolest period ahead with temperatures near 41 degrees F.
The strongest winds are forecast for Tuesday at about 5 to 15 mph SSE.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- May 8, 2026 3:19 AM CDT
- Coverage
- 5 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 41.
Sunny, with a high near 56.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 42.
Rain showers likely before 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 60.
Showers and thunderstorms likely before 1am. Mostly cloudy, with a low around 45.
Partly sunny, with a high near 63.
Partly cloudy, with a low around 47.
Mostly sunny, with a high near 71.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
May 10
|
Mostly Sunny
|
59°F |
5 to 10 mph
N
|
|
Sunday Night
May 10
|
Partly Cloudy
|
41°F |
0 to 10 mph
NNW
|
|
Monday
May 11
|
Sunny
|
56°F |
5 to 10 mph
NE
|
|
Monday Night
May 11
|
Partly Cloudy then Slight Chance Rain Showers
|
42°F |
5 mph
ESE
|
|
Tuesday
May 12
|
Rain Showers Likely
|
60°F |
5 to 15 mph
SSE
|
|
Tuesday Night
May 12
|
Showers And Thunderstorms Likely
|
45°F |
5 to 15 mph
WNW
|
|
Wednesday
May 13
|
Partly Sunny
|
63°F |
5 to 10 mph
NNW
|
|
Wednesday Night
May 13
|
Partly Cloudy
|
47°F |
5 mph
NNW
|
|
Thursday
May 14
|
Mostly Sunny
|
71°F |
5 to 10 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.
