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

Record Heat for the Intermountain West and Northern Plains; Heavy Rainfall and Severe Weather Threats

Record setting heat is expected over the next several days from the Intermountain West through the northern Plains. Furthermore, fire weather concerns increase with dry and breezy conditions. Meanwhile, heavy rainfall and severe thunderstorm threats for the Ohio/Tennessee Valleys, central Appalachians and Southeast today. The threat shifts to central Gulf Coast and across central Texas this week. Read More >

Current conditions at

Lewis University Airport (KLOT)

Lat: 41.6°NLon: 88.1°WElev: 669ft.

Fair

88°F

31°C

Humidity 40%
Wind Speed E 7 G 15 mph
Barometer 30.17 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 12 Jul 3:45 pm CDT
Extended Forecast for

2 Miles WNW Chicago/Romeoville, Lewis University Airport IL

  • Tonight

    Tonight: Clear, with a low around 65. East northeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 10 mph.

    Low: 65 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 90. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 70. Northwest wind around 5 mph becoming calm in the evening.

    Low: 70 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92. Heat index values as high as 100. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 72. West southwest wind around 5 mph.

    Low: 72 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 65. East northeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 10 mph.
Monday
Sunny, with a high near 90. Calm wind becoming west northwest around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 70. Northwest wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 92. Heat index values as high as 100. Calm wind becoming west southwest around 5 mph in the afternoon.
Tuesday Night
Clear, with a low around 72. West southwest wind around 5 mph.
Wednesday
Sunny, with a high near 93.
Wednesday Night
Mostly clear, with a low around 72.
Thursday
Sunny, with a high near 91.
Thursday Night
Mostly clear, with a low around 71.
Friday
Mostly sunny, with a high near 90.
Friday Night
Partly cloudy, with a low around 70.
Saturday
Mostly sunny, with a high near 88.
Saturday Night
Partly cloudy, with a low around 68.
Sunday
Mostly sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Chicago/Romeoville, Lewis University Airport IL
 41.63°N 88.13°W
Last Update:
1:21 pm CDT Jul 12, 2026
Forecast Valid:
4pm CDT Jul 12, 2026-6pm CDT Jul 19, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation