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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

89°F

32°C

Humidity	61%
Wind Speed	SW 13 mph
Barometer	29.87 in (1009.9 mb)
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	98°F (37°C)
Last update	4 Sep 4:51 pm CDT

More Information:

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

Extended Forecast for

Hainesville IL

Tonight
Low: 70 °F
Chance
T-storms and
Patchy Fog
Saturday
High: 81 °F
Patchy Fog
then Partly
Sunny
Saturday Night
Low: 62 °F
Partly Cloudy
Sunday
High: 78 °F
Mostly Sunny
Sunday Night
Low: 60 °F
Partly Cloudy
Labor Day
High: 80 °F
Mostly Sunny
Monday Night
Low: 62 °F
Mostly Cloudy
Tuesday
High: 85 °F
Partly Sunny
Tuesday Night
Low: 70 °F
Partly Cloudy
then Chance
T-storms

Detailed Forecast

Tonight

A 30 percent chance of showers and thunderstorms, mainly before 2am. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 70. West wind around 5 mph becoming calm in the evening.

Saturday

Patchy fog before 9am. Otherwise, partly sunny, with a high near 81. North wind 5 to 10 mph.

Saturday Night

Partly cloudy, with a low around 62. Northeast wind 5 to 10 mph.

Sunday

Mostly sunny, with a high near 78. East wind 5 to 10 mph.

Sunday Night

Partly cloudy, with a low around 60. East northeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 10 mph.

Labor Day

Mostly sunny, with a high near 80.

Monday Night

Mostly cloudy, with a low around 62.