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September 2025 Climate Summary

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Chicago / Wheeling, Pal-Waukee Airport (KPWK)

Lat: 42.12°NLon: 87.9°WElev: 646ft.

Thunderstorm in Vicinity

62°F

17°C

Humidity	93%
Wind Speed	N 7 mph
Barometer	30.04 in (1016.8 mb)
Dewpoint	60°F (16°C)
Visibility	10.00 mi
Last update	7 Oct 2:52 am CDT

More Information:

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

Extended Forecast for

Crystal Lake IL

Overnight
Low: 58 °F
T-storms
Tuesday
High: 66 °F
Chance
Showers then
Mostly Sunny
Tuesday Night
Low: 40 °F
Mostly Clear
Wednesday
High: 64 °F
Sunny
Wednesday Night
Low: 40 °F
Mostly Clear
Thursday
High: 64 °F
Sunny
Thursday Night
Low: 43 °F
Mostly Clear
Friday
High: 68 °F
Mostly Sunny
Friday Night
Low: 49 °F
Partly Cloudy

Detailed Forecast

Overnight

Showers and possibly a thunderstorm, mainly before 5am, then a chance of showers and thunderstorms after 5am. Steady temperature around 58. North wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tuesday

A chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 8am. Cloudy through mid morning, then gradual clearing, with a high near 66. North wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 30%.

Tuesday Night

Mostly clear, with a low around 40. North northwest wind around 5 mph.

Wednesday

Sunny, with a high near 64. North wind around 5 mph, with gusts as high as 10 mph.

Wednesday Night

Mostly clear, with a low around 40. East northeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 10 mph.

Thursday

Sunny, with a high near 64.

Thursday Night

Mostly clear, with a low around 43.

Friday

Mostly sunny, with a high near 68.