National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Chicago / Wheeling, Pal-Waukee Airport (KPWK)

Lat: 42.12°NLon: 87.9°WElev: 646ft.

Mostly Cloudy

75°F

24°C

Humidity 69%
Wind Speed E 8 mph
Barometer 30.05 in (1017.2 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 17 Aug 12:52 pm CDT
Extended Forecast for

Crystal Lake IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 79. North northwest wind around 5 mph, with gusts as high as 15 mph.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 61. Northwest wind around 5 mph becoming calm.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 79. West southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 79 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers. Mostly cloudy, with a low around 63. West southwest wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 60%.

    Low: 63 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. Calm wind becoming north around 5 mph in the afternoon.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers after 1pm. Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 79. North northwest wind around 5 mph, with gusts as high as 15 mph.
Tonight
Mostly clear, with a low around 61. Northwest wind around 5 mph becoming calm.
Tuesday
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 79. West southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers. Mostly cloudy, with a low around 63. West southwest wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 60%.
Wednesday
Mostly sunny, with a high near 77. Calm wind becoming north around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 59.
Thursday
Sunny, with a high near 78.
Thursday Night
Mostly clear, with a low around 60.
Friday
A chance of showers after 1pm. Mostly sunny, with a high near 78.
Friday Night
A chance of showers. Partly cloudy, with a low around 62.
Saturday
A chance of showers. Mostly sunny, with a high near 75.
Saturday Night
Mostly clear, with a low around 58.
Sunday
Mostly sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Crystal Lake IL
 42.23°N 88.33°W
Last Update:
2:46 pm CDT Aug 17, 2026
Forecast Valid:
2pm CDT Aug 17, 2026-6pm CDT Aug 23, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation