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.

Thunderstorm Rain Fog/Mist

69°F

21°C

Humidity 100%
Wind Speed SW 5 mph
Barometer 30.21 in (1022.3 mb)
Dewpoint 69°F (21°C)
Visibility 2.00 mi
Last update 17 Sep 6:53 am CDT
Extended Forecast for

Forest Park IL

  • Today

    Today: Showers and thunderstorms before 11am, then a slight chance of showers between 11am and noon. Patchy fog before 10am. High near 76. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 76 °F

    Showers and
    Patchy Fog
    then Mostly
    Cloudy

  • Tonight

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

    Low: 66 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 74. East wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 74 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. East southeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.

    Low: 65 °F

    Slight Chance
    Showers 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. Cloudy, with a high near 65.

    High: 65 °F

    Showers
    Likely

Detailed Forecast

Today
Showers and thunderstorms before 11am, then a slight chance of showers between 11am and noon. Patchy fog before 10am. High near 76. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Mostly cloudy, with a low around 66. Northeast wind around 5 mph, with gusts as high as 10 mph.
Friday
Mostly cloudy, with a high near 74. East wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. 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. Cloudy, with a high near 65.
Monday Night
Mostly cloudy, with a low around 56.
Tuesday
Mostly cloudy, with a high near 67.
Tuesday Night
Mostly cloudy, with a low around 57.
Wednesday
Mostly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Forest Park IL
 41.86°N 87.82°W
Last Update:
7:41 am CDT Sep 17, 2026
Forecast Valid:
7am 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