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

Hazardous Weather Conditions

Current conditions at

Chicago, Chicago Midway Airport (KMDW)

Lat: 41.78°NLon: 87.76°WElev: 617ft.

Light Rain Fog/Mist

74°F

23°C

Humidity 91%
Wind Speed E 10 mph
Barometer 29.95 in (1013.5 mb)
Dewpoint 71°F (22°C)
Visibility 4.00 mi
Last update 13 Aug 5:53 pm CDT
Extended Forecast for

Westmont IL

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm. Cloudy, with a low around 68. Northeast wind 5 to 10 mph becoming east southeast in the evening. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.

    Low: 68 °F

    Showers
    Likely

  • Friday

    Friday: A 50 percent chance of showers, mainly before 9am. Mostly cloudy, with a high near 80. East wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 80 °F

    Chance
    Showers then
    Partly Sunny

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 70. East northeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 70 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm. High near 84. Southeast wind around 10 mph becoming south southwest in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 80%.

    High: 84 °F

    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 72. West southwest wind 5 to 10 mph. Chance of precipitation is 50%.

    Low: 72 °F

    Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 84. Chance of precipitation is 60%.

    High: 84 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 68.

    Low: 68 °F

    Slight Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers likely and possibly a thunderstorm. Cloudy, with a low around 68. Northeast wind 5 to 10 mph becoming east southeast in the evening. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.
Friday
A 50 percent chance of showers, mainly before 9am. Mostly cloudy, with a high near 80. East wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 70. East northeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm. High near 84. Southeast wind around 10 mph becoming south southwest in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 80%.
Saturday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 72. West southwest wind 5 to 10 mph. Chance of precipitation is 50%.
Sunday
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 84. Chance of precipitation is 60%.
Sunday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 68.
Monday
Mostly sunny, with a high near 79.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 67.
Wednesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 82.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Thursday
Partly sunny, with a high near 78.
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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:
2:31 pm CDT Aug 13, 2026
Forecast Valid:
6pm CDT Aug 13, 2026-6pm CDT Aug 20, 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation