Waukegan, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Waukegan, IL in one place.
Sunny. High near 91, with temperatures falling to around 89 in the afternoon. Heat index values as high as 97. South southeast wind around 5 mph.
Local Weather Overview
This forecast page for Waukegan, 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 14, 2026 6:00 PM CDT.
The active forecast window currently covers Jul 14 to Jul 20, 2026 for Waukegan, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 14 to Jul 20, 2026
- Latest sync
- Jul 14, 2026 6:00 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Waukegan
Wednesday looks like the warmest upcoming period in Waukegan at 93 degrees F.
Saturday Night is the coolest period ahead with temperatures near 68 degrees F.
The strongest winds are forecast for Saturday at about 5 to 10 mph W.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 6:00 PM 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 74. West southwest wind around 5 mph.
Sunny. High near 93, with temperatures falling to around 89 in the afternoon. Heat index values as high as 98. North northeast wind around 5 mph.
Mostly clear, with a low around 72. North northeast wind around 5 mph.
Mostly sunny, with a high near 85. East northeast wind around 5 mph.
Partly cloudy, with a low around 71.
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87.
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 72.
A chance of showers and thunderstorms after 1pm. Sunny, with a high near 92.
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 68.
Mostly sunny, with a high near 86.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89.
A chance of rain showers. Partly cloudy, with a low around 68.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Jul 14
|
Sunny
|
91°F |
5 mph
SSE
|
|
Tonight
Jul 14
|
Mostly Clear
|
74°F |
5 mph
WSW
|
|
Wednesday
Jul 15
|
Sunny
|
93°F |
5 mph
NNE
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
72°F |
5 mph
NNE
|
|
Thursday
Jul 16
|
Mostly Sunny
|
85°F |
5 mph
ENE
|
|
Thursday Night
Jul 16
|
Partly Cloudy
|
71°F |
5 mph
NE
|
|
Friday
Jul 17
|
Mostly Sunny then Chance Showers And Thunderstorms
|
87°F |
5 mph
ESE
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms
|
72°F |
0 to 5 mph
SSW
|
|
Saturday
Jul 18
|
Sunny then Chance Showers And Thunderstorms
|
92°F |
5 to 10 mph
W
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
68°F |
5 to 10 mph
NNW
|
|
Sunday
Jul 19
|
Mostly Sunny
|
86°F |
5 mph
NE
|
|
Sunday Night
Jul 19
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
69°F |
0 to 5 mph
S
|
|
Monday
Jul 20
|
Slight Chance Showers And Thunderstorms
|
89°F |
5 to 10 mph
WSW
|
|
Monday Night
Jul 20
|
Chance Rain Showers
|
68°F |
5 to 10 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Waukegan.
