Thunderstorms and Heavy Rains in the Appalachians

Multiple rounds of moderate to locally heavy rain will impact portions of the Appalachians and Mid-Atlantic, which may lead to flash flooding concerns. Thunderstorms with isolated severe wind gusts will be possible this afternoon from parts of the Southeast into the southern and central Appalachians. A multi-day heavy rain will pose a flash flood threat in New Mexico beginning Tuesday. Read More >

Hazardous Weather Conditions

Current conditions at

Lewis University Airport (KLOT)

Lat: 41.6°NLon: 88.1°WElev: 669ft.

Overcast and Breezy

66°F

19°C

Humidity 78%
Wind Speed NE 21 mph
Barometer 30.13 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 21 Sep 2:45 pm CDT
Extended Forecast for

Lemont IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 64. East northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 64 °F

    Mostly Cloudy

  • Tonight

    Tonight: Cloudy, with a low around 55. East northeast wind around 10 mph, with gusts as high as 15 mph.

    Low: 55 °F

    Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 61. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 61 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 54. Northeast wind around 10 mph, with gusts as high as 15 mph.

    Low: 54 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 65. Northeast wind around 10 mph, with gusts as high as 20 mph.

    High: 65 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 53.

    Low: 53 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 64. East northeast wind around 15 mph, with gusts as high as 25 mph.
Tonight
Cloudy, with a low around 55. East northeast wind around 10 mph, with gusts as high as 15 mph.
Tuesday
Mostly cloudy, with a high near 61. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 54. Northeast wind around 10 mph, with gusts as high as 15 mph.
Wednesday
Partly sunny, with a high near 65. Northeast wind around 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 54.
Thursday
Partly sunny, with a high near 66.
Thursday Night
Mostly cloudy, with a low around 53.
Friday
Mostly sunny, with a high near 66.
Friday Night
Partly cloudy, with a low around 51.
Saturday
Partly sunny, with a high near 66.
Saturday Night
Mostly cloudy, with a low around 53.
Sunday
Partly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
Lemont IL
 41.67°N 87.98°W
1:55 pm CDT Sep 21, 2026
3pm CDT Sep 21, 2026-6pm CDT Sep 27, 2026
 
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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