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August and Meteorological Summer 2026 Climate Summaries

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

70°F

21°C

Humidity	97%
Wind Speed	NE 5 mph
Barometer	29.94 in (1012.7 mb)
Dewpoint	69°F (21°C)
Visibility	10.00 mi
Last update	4 Sep 6:51 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Gages Lake IL

Heat Advisory September 4, 07:41am until September 4, 10:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory September 4, 07:41am until September 4, 10:00pm
NOW until 10:00pm Fri
Heat Advisory
Today
High: 91 °F
Chance
T-storms then
Sunny
Tonight
Low: 71 °F
Slight Chance
T-storms
Saturday
High: 82 °F
Partly Sunny
Saturday Night
Low: 65 °F
Partly Cloudy
Sunday
High: 79 °F
Mostly Sunny
Sunday Night
Low: 63 °F
Partly Cloudy
Labor Day
High: 80 °F
Mostly Sunny
Monday Night
Low: 64 °F
Mostly Cloudy

Detailed Forecast

Today

A 30 percent chance of showers and thunderstorms, mainly between 10am and 11am. Mostly cloudy, then gradually becoming sunny, with a high near 91. Heat index values as high as 102. East northeast wind 5 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 15 mph.

Tonight

A 20 percent chance of showers and thunderstorms after 8pm. Increasing clouds, with a low around 71. West southwest wind around 5 mph.

Saturday

Partly sunny, with a high near 82. North northwest wind 5 to 10 mph becoming northeast in the afternoon.

Saturday Night

Partly cloudy, with a low around 65. Northeast wind 5 to 10 mph.

Sunday

Mostly sunny, with a high near 79. East wind 5 to 10 mph.

Sunday Night

Partly cloudy, with a low around 63.

Labor Day

Mostly sunny, with a high near 80.