Heat Persists in the South Central U.S. and Southwest; Heavy rains in the Desert Southwest and Central Plains

Sweltering heat remains across the South-Central Plains, Lower/Middle Mississippi Valley, and the Southwest this week with limited nighttime relief. Thunderstorms will bring heavy rainfall leading to localized flash flooding in portions of the Desert Southwest and central Plains. Isolated strong to severe thunderstorms are possible across portions of the central Plains into the Northeast. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

77°F

25°C

Humidity 79%
Wind Speed W 7 mph
Barometer 29.96 in (1013.5 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 9 Sep 5:51 pm CDT
Extended Forecast for

Long Lake IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 60. West southwest wind around 5 mph.

    Low: 60 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 78. North northwest wind around 5 mph.

    High: 78 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52. Calm wind.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 79. Light and variable wind becoming south 5 to 10 mph in the morning.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60. Southeast wind around 5 mph, with gusts as high as 10 mph.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms.  Mostly cloudy, with a low around 57. Chance of precipitation is 20%.

    Low: 57 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers after 1am.  Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 60. West southwest wind around 5 mph.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 78. North northwest wind around 5 mph.
Thursday Night
Mostly clear, with a low around 52. Calm wind.
Friday
Sunny, with a high near 79. Light and variable wind becoming south 5 to 10 mph in the morning.
Friday Night
Mostly clear, with a low around 60. Southeast wind around 5 mph, with gusts as high as 10 mph.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 78.
Sunday Night
A chance of showers after 1am. Mostly cloudy, with a low around 62.
Monday
A chance of showers. Partly sunny, with a high near 84.
Monday Night
Showers likely. Mostly cloudy, with a low around 63.
Tuesday
A chance of showers. Mostly cloudy, with a high near 78.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 58.
Wednesday
A chance of showers. Partly sunny, with a high near 74.
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ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
2:31 pm CDT Sep 9, 2026
6pm CDT Sep 9, 2026-6pm CDT Sep 16, 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