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

Heavy to Excessive Rainfall This Week from the Southwest into Central U.S.

Pacific tropical moisture wrapping into a storm over the southwest U.S. will continue a multi-day heavy rainfall event this week that will extend into the Midwest and southern Plains. Considerable flash flooding is possible across portions of New Mexico and west Texas today through Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fog/Mist

60°F

16°C

Humidity 100%
Wind Speed S 3 mph
Barometer 30.05 in (1017.3 mb)
Dewpoint 60°F (16°C)
Visibility 1.25 mi
Last update 29 Sep 9:51 am CDT
Extended Forecast for

Round Lake Heights IL

  • Today

    Today: Mostly sunny, with a high near 74. South southwest wind 5 to 10 mph.

    High: 74 °F

    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 5am. Mostly cloudy, with a low around 61. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 61 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers. High near 69. South southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 69 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely. Cloudy, with a low around 64. South southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%.

    Low: 64 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 70. Southwest wind around 5 mph becoming north in the afternoon. Winds could gust as high as 10 mph. Chance of precipitation is 90%.

    High: 70 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely. Cloudy, with a low around 53. Chance of precipitation is 70%.

    Low: 53 °F

    Showers
    Likely

  • Friday

    Friday: A 40 percent chance of showers before 1pm. Partly sunny, with a high near 64.

    High: 64 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 74. South southwest wind 5 to 10 mph.
Tonight
A 30 percent chance of showers, mainly after 5am. Mostly cloudy, with a low around 61. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday
Showers. High near 69. South southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
Showers likely. Cloudy, with a low around 64. South southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%.
Thursday
Showers and possibly a thunderstorm. High near 70. Southwest wind around 5 mph becoming north in the afternoon. Winds could gust as high as 10 mph. Chance of precipitation is 90%.
Thursday Night
Showers likely. Cloudy, with a low around 53. Chance of precipitation is 70%.
Friday
A 40 percent chance of showers before 1pm. Partly sunny, with a high near 64.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 63.
Saturday Night
Partly cloudy, with a low around 48.
Sunday
Mostly sunny, with a high near 65.
Sunday Night
Mostly clear, with a low around 44.
Monday
Sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Round Lake Heights IL
 42.38°N 88.11°W
Last Update:
9:11 am CDT Sep 29, 2026
Forecast Valid:
10am CDT Sep 29, 2026-6pm CDT Oct 5, 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