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.

A Few Clouds and Breezy

91°F

33°C

Humidity 67%
Wind Speed S 24 G 35 mph
Barometer 29.91 in
Dewpoint 79°F (26°C)
Visibility 7.00 mi
Heat Index107°F (42°C)
Last update 30 Jun 5:45 pm CDT
Extended Forecast for

Romeoville IL

Extreme Heat Warning June 30, 06:29pm until July 3, 12:00am
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 30, 06:29pm until July 3, 12:00am

    NOW until 12:00am Fri

    Extreme Heat Warning

  • Tonight

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Heat index values as high as 105. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 94. Heat index values as high as 104. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 94 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am. Partly cloudy, with a low around 75. South southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.

    Low: 75 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Friday

    Friday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 92. Chance of precipitation is 70%.

    High: 92 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms

  • Independence Day

    Independence Day: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87.

    High: 87 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 76. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Wednesday
Sunny, with a high near 94. Heat index values as high as 105. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 77. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 94. Heat index values as high as 104. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
A slight chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am. Partly cloudy, with a low around 75. South southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.
Friday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 92. Chance of precipitation is 70%.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Independence Day
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87.
Saturday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 69.
Sunday
A chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 68.
Monday
Mostly sunny, with a high near 85.
Monday Night
Partly cloudy, with a low around 67.
Tuesday
Partly sunny, with a high near 86.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Romeoville IL
 41.63°N 88.1°W
Last Update:
2:46 pm CDT Jun 30, 2026
Forecast Valid:
6pm CDT Jun 30, 2026-6pm CDT Jul 7, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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