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

Heavy Rain in the Ohio and Tennessee Valleys; Watching for Tropical Cyclone Development in the Atlantic

Heavy to excessive rainfall may bring areas of flash and urban flooding over portions of the Ohio and Tennessee Valleys. Two tropical waves in the Atlantic are being monitored for tropical cyclone formation within the next few days. One tropical wave will bring periods of heavy rain, thunderstorms, flood risk, and landslides to Puerto Rico and the US Virgin Islands through Friday morning. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago / Wheeling, Pal-Waukee Airport (KPWK)

Lat: 42.12°NLon: 87.9°WElev: 646ft.

A Few Clouds

64°F

18°C

Humidity 87%
Wind Speed N 7 mph
Barometer 30.05 in (1017.3 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 24 Sep 7:52 am CDT
Extended Forecast for

Crystal Lake IL

  • Today

    Today: Partly sunny, with a high near 69. North northeast wind around 10 mph, with gusts as high as 20 mph.

    High: 69 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 54. North wind around 5 mph, with gusts as high as 15 mph.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 74. Northwest wind 5 to 10 mph.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52. West northwest wind around 5 mph becoming calm.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 80. West southwest wind around 5 mph, with gusts as high as 10 mph.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 69. North northeast wind around 10 mph, with gusts as high as 20 mph.
Tonight
Partly cloudy, with a low around 54. North wind around 5 mph, with gusts as high as 15 mph.
Thursday
Mostly sunny, with a high near 74. Northwest wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 52. West northwest wind around 5 mph becoming calm.
Friday
Sunny, with a high near 80. West southwest wind around 5 mph, with gusts as high as 10 mph.
Friday Night
Mostly clear, with a low around 56.
Saturday
Sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Sunny, with a high near 82.
Sunday Night
Mostly clear, with a low around 56.
Monday
Sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 57.
Tuesday
Mostly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Crystal Lake IL
 42.23°N 88.33°W
Last Update:
5:42 am CDT Sep 24, 2025
Forecast Valid:
8am CDT Sep 24, 2025-6pm CDT Sep 30, 2025
 
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

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation