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

Excessive Rainfall Potential for the Southeast; Heat Expands for Center of the Nation; Critical Fire Weather for Pacific Northwest

Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

60°F

16°C

Humidity 86%
Wind Speed Calm
Barometer 30.03 in (1016.0 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 25 Jul 2:51 am CDT
Extended Forecast for

Third Lake IL

  • Overnight

    Overnight: Partly cloudy, with a low around 61. South southwest wind around 5 mph.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: Cloudy, then gradually becoming mostly sunny, with a high near 79. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 79 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 70. Southwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 70 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 90. Heat index values as high as 99. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 90 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 73 °F

    Chance
    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.

    High: 90 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 68.

    Low: 68 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 61. South southwest wind around 5 mph.
Saturday
Cloudy, then gradually becoming mostly sunny, with a high near 79. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday Night
Partly cloudy, with a low around 70. Southwest wind around 5 mph, with gusts as high as 10 mph.
Sunday
Mostly sunny, with a high near 90. Heat index values as high as 99. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Monday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 68.
Tuesday
Mostly sunny, with a high near 84.
Tuesday Night
Mostly clear, with a low around 63.
Wednesday
Sunny, with a high near 84.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
Partly cloudy, with a low around 65.
Friday
Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Third Lake IL
 42.37°N 88.02°W
Last Update:
3:06 am CDT Jul 25, 2026
Forecast Valid:
3am CDT Jul 25, 2026-6pm CDT Jul 31, 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