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 the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago, Chicago Midway Airport (KMDW)

Lat: 41.78°NLon: 87.76°WElev: 617ft.

Fog/Mist

70°F

21°C

Humidity 93%
Wind Speed NE 13 mph
Barometer 30.19 in (1021.6 mb)
Dewpoint 68°F (20°C)
Visibility 3.00 mi
Last update 17 Sep 6:53 pm CDT
Extended Forecast for

Chicago IL

  • Tonight

    Tonight: Patchy drizzle with a slight chance of showers before 10pm. Mostly cloudy, with a low around 66. North northeast wind 5 to 10 mph.

    Low: 66 °F

    Patchy
    Drizzle then
    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 71. East wind around 10 mph, with gusts as high as 15 mph.

    High: 71 °F

    Partly Sunny

  • Friday Night

    Friday Night: Showers and thunderstorms likely, mainly before 4am, then showers likely and possibly a thunderstorm after 5am. Cloudy, with a low around 63. Southeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Mostly Cloudy
    then Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 73. South southeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 100%.

    High: 73 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 65. North northeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 90%.

    Low: 65 °F

    Showers

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.

    High: 69 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely

  • Monday

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

    High: 65 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers before 1am. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Chance
    Showers

Detailed Forecast

Tonight
Patchy drizzle with a slight chance of showers before 10pm. Mostly cloudy, with a low around 66. North northeast wind 5 to 10 mph.
Friday
Partly sunny, with a high near 71. East wind around 10 mph, with gusts as high as 15 mph.
Friday Night
Showers and thunderstorms likely, mainly before 4am, then showers likely and possibly a thunderstorm after 5am. Cloudy, with a low around 63. Southeast wind around 10 mph, with gusts as high as 15 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. High near 73. South southeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 100%.
Saturday Night
Showers and possibly a thunderstorm. Low around 65. North northeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 90%.
Sunday
Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.
Sunday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Monday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 65.
Monday Night
A chance of showers before 1am. Mostly cloudy, with a low around 57.
Tuesday
Partly sunny, with a high near 64.
Tuesday Night
Mostly cloudy, with a low around 57.
Wednesday
Partly sunny, with a high near 67.
Wednesday Night
Mostly cloudy, with a low around 58.
Thursday
Partly sunny, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Chicago IL
 41.84°N 87.68°W
Last Update:
2:41 pm CDT Sep 17, 2026
Forecast Valid:
7pm CDT Sep 17, 2026-6pm CDT Sep 24, 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