Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

63°F

17°C

Humidity 93%
Wind Speed NW 7 mph
Barometer 29.96 in (1013.5 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 27 Aug 5:51 am CDT
Extended Forecast for

Hainesville IL

  • Today

    Today: A slight chance of showers between 1pm and 3pm.  Mostly sunny, with a high near 80. Northwest wind 5 to 10 mph becoming northeast in the afternoon.  Chance of precipitation is 20%.

    High: 80 °F

    Sunny then
    Slight Chance
    Showers

  • Tonight

    Tonight: Mostly clear, with a low around 59. East wind around 5 mph becoming calm  in the evening.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 80. Calm wind becoming west around 5 mph in the afternoon.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 62. South southeast wind around 5 mph.

    Low: 62 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 80. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 80 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms before 1pm.  Partly sunny, with a high near 85.

    High: 85 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers after 1am.  Mostly cloudy, with a low around 71.

    Low: 71 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A chance of showers and thunderstorms before 1pm.  Partly sunny, with a high near 85.

    High: 85 °F

    Chance
    T-storms

Detailed Forecast

Today
A slight chance of showers between 1pm and 3pm. Mostly sunny, with a high near 80. Northwest wind 5 to 10 mph becoming northeast in the afternoon. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 59. East wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 80. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 62. South southeast wind around 5 mph.
Saturday
Partly sunny, with a high near 80. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Sunday
A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85.
Sunday Night
A chance of showers after 1am. Mostly cloudy, with a low around 71.
Monday
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85.
Monday Night
A chance of showers after 1am. Partly cloudy, with a low around 71.
Tuesday
A chance of showers. Partly sunny, with a high near 86.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 69.
Wednesday
Mostly sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
Hainesville IL
 42.33°N 88.05°W
3:11 am CDT Aug 27, 2026
6am CDT Aug 27, 2026-6pm CDT Sep 2, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database