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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago, Chicago Midway Airport (KMDW)

Lat: 41.78°NLon: 87.76°WElev: 617ft.

Mostly Cloudy

76°F

24°C

Humidity 85%
Wind Speed SW 5 mph
Barometer 30.20 in (1021.8 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 17 Sep 11:53 am CDT
Extended Forecast for

Westmont IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 77. Southwest wind around 5 mph becoming north northeast.

    High: 77 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 66. Northeast wind 5 to 10 mph.

    Low: 66 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 75. East wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 75 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. East southeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.

    Low: 64 °F

    Mostly Cloudy
    then Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 81. South wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 80%.

    High: 81 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 66. Chance of precipitation is 80%.

    Low: 66 °F

    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms before 1pm, then a slight chance of showers. Mostly cloudy, with a high near 70. Chance of precipitation is 50%.

    High: 70 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers. Cloudy, with a low around 58.

    Low: 58 °F

    Chance
    Showers

  • Monday

    Monday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 65.

    High: 65 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 77. Southwest wind around 5 mph becoming north northeast.
Tonight
Mostly cloudy, with a low around 66. Northeast wind 5 to 10 mph.
Friday
Mostly cloudy, with a high near 75. East wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night
Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. East southeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
Saturday
Showers and possibly a thunderstorm. High near 81. South wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm. Low around 66. Chance of precipitation is 80%.
Sunday
A chance of showers and thunderstorms before 1pm, then a slight chance of showers. Mostly cloudy, with a high near 70. Chance of precipitation is 50%.
Sunday Night
A chance of showers. Cloudy, with a low around 58.
Monday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 65.
Monday Night
Mostly cloudy, with a low around 56.
Tuesday
Partly sunny, with a high near 67.
Tuesday Night
Mostly cloudy, with a low around 56.
Wednesday
Mostly sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Westmont IL
 41.8°N 87.97°W
Last Update:
10:51 am CDT Sep 17, 2026
Forecast Valid:
12pm CDT Sep 17, 2026-6pm CDT Sep 23, 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