Great Lakes, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Great Lakes, IL in one place.
Sunny, with a high near 75.
Local Weather Overview
This forecast page for Great Lakes, 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: Jun 11, 2026 8:10 PM CDT.
The active forecast window currently covers Jun 15 to Jun 18, 2026 for Great Lakes, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 15 to Jun 18, 2026
- Latest sync
- Jun 11, 2026 8:10 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Great Lakes
Wednesday looks like the warmest upcoming period in Great Lakes at 80 degrees F.
Monday Night is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Thursday at about 10 to 15 mph W.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 11, 2026 8:10 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 55.
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 77.
A chance of showers and thunderstorms. Partly cloudy, with a low around 57.
A chance of rain showers before 7am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 80.
Showers and thunderstorms likely. Mostly cloudy, with a low around 61.
Rain showers likely before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 80.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Jun 15
|
Sunny
|
75°F |
5 to 10 mph
W
|
|
Monday Night
Jun 15
|
Partly Cloudy
|
55°F |
0 to 10 mph
W
|
|
Tuesday
Jun 16
|
Mostly Sunny then Chance Showers And Thunderstorms
|
77°F |
5 to 10 mph
WSW
|
|
Tuesday Night
Jun 16
|
Chance Showers And Thunderstorms
|
57°F |
5 to 10 mph
SW
|
|
Wednesday
Jun 17
|
Chance Rain Showers
|
80°F |
5 to 10 mph
SW
|
|
Wednesday Night
Jun 17
|
Showers And Thunderstorms Likely
|
61°F |
5 to 10 mph
SSW
|
|
Thursday
Jun 18
|
Rain Showers Likely
|
80°F |
10 to 15 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Great Lakes.