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.

Fair

79°F

26°C

Humidity 58%
Wind Speed E 8 mph
Barometer 29.99 in (1015.2 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 3 Aug 4:52 pm CDT
Extended Forecast for

Crystal Lake IL

  • Tonight

    Tonight: Mostly clear, with a low around 63. South wind around 5 mph becoming calm.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms, mainly after 4am. Increasing clouds, with a low around 68. South southwest wind around 5 mph.

    Low: 68 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 74. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 70%.

    High: 74 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 4am, then showers likely. Low around 64. Northwest wind around 5 mph becoming calm. Chance of precipitation is 80%.

    Low: 64 °F

    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 76. Chance of precipitation is 40%.

    High: 76 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 63. South wind around 5 mph becoming calm.
Tuesday
Mostly sunny, with a high near 82. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms, mainly after 4am. Increasing clouds, with a low around 68. South southwest wind around 5 mph.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 74. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 70%.
Wednesday Night
Showers and possibly a thunderstorm before 4am, then showers likely. Low around 64. Northwest wind around 5 mph becoming calm. Chance of precipitation is 80%.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 76. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 58.
Friday
Sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 62.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 66.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Monday
A chance of showers. Partly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Crystal Lake IL
 42.23°N 88.33°W
Last Update:
1:21 pm CDT Aug 3, 2026
Forecast Valid:
5pm CDT Aug 3, 2026-6pm CDT Aug 10, 2026
 
Forecast Discussion
 
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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