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

88°F

31°C

Humidity 70%
Wind Speed S 17 mph
Barometer 29.91 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 29 Jun 6:50 pm CDT
Extended Forecast for

4 Miles ESE Lemont IL

Heat Advisory June 29, 07:15pm until July 1, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 29, 07:15pm until July 1, 10:00pm

    NOW until 10:00pm Wed

    Heat Advisory

  • Tonight

    Low: 78 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 94. Heat index values as high as 107. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 94 °F

    Sunny

  • Tuesday Night

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

    Low: 77 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 95. Heat index values as high as 104. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 95 °F

    Hot

  • 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: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 75. Chance of precipitation is 60%.

    Low: 75 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

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

    High: 90 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 78. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 94. Heat index values as high as 107. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 77. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday
Sunny and hot, with a high near 95. Heat index values as high as 104. 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
Mostly sunny, with a high near 93.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 75. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Independence Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 86.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Monday
Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Lemont IL
 41.65°N 87.93°W
Last Update:
3:17 pm CDT Jun 29, 2026
Forecast Valid:
7pm CDT Jun 29, 2026-6pm CDT Jul 6, 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