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

Hazardous Weather Conditions

Current conditions at

Lewis University Airport (KLOT)

Lat: 41.6°NLon: 88.1°WElev: 669ft.

Mostly Cloudy

90°F

32°C

Humidity 71%
Wind Speed S 6 mph
Barometer 29.91 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index107°F (42°C)
Last update 3 Sep 5:45 pm CDT
Extended Forecast for

Romeoville IL

Heat Advisory September 3, 06:47pm until September 3, 09:00pm
Click here for hazard details and duration
...
  •  
    Heat Advisory September 3, 06:47pm until September 3, 09:00pm

    NOW until 9:00pm Thu

    Heat Advisory

  • Tonight

    Low: 73 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms before 10am. Mostly sunny, with a high near 92. Heat index values as high as 101. South southeast wind 5 to 10 mph becoming north northeast in the morning.

    High: 92 °F

    Slight Chance
    T-storms then
    Sunny

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 71. West southwest wind around 5 mph becoming east northeast after midnight.

    Low: 71 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 86. Northeast wind 5 to 10 mph.

    High: 86 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 66. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 73. South wind around 5 mph.
Friday
A 20 percent chance of showers and thunderstorms before 10am. Mostly sunny, with a high near 92. Heat index values as high as 101. South southeast wind 5 to 10 mph becoming north northeast in the morning.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 71. West southwest wind around 5 mph becoming east northeast after midnight.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 86. Northeast wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 66. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
Partly cloudy, with a low around 62.
Labor Day
Mostly sunny, with a high near 82.
Monday Night
Mostly cloudy, with a low around 64.
Tuesday
Mostly sunny, with a high near 87.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 71.
Wednesday
Mostly sunny, with a high near 88.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 69.
Thursday
Mostly sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Romeoville IL
 41.66°N 88.1°W
Last Update:
5:51 pm CDT Sep 3, 2026
Forecast Valid:
6pm CDT Sep 3, 2026-6pm CDT Sep 10, 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