Heavy Rainfall Possible in the Upper Midwest, South Texas, and Puerto Rico and the Virgin Islands

Scattered thunderstorms and heavy rainfall may bring areas of flooding though the weekend over the Upper Midwest. A tropical disturbance will bring moderate to locally heavy rain to portions of South Texas into Saturday. Tropical Storm Erin may bring isolated flash and urban flooding, landslides or mudslides, and tropical storm conditions to Puerto Rico and the U.S. Virgin Islands. Read More >

Hazardous Weather Conditions

Current conditions at

Lansing Municipal Airport (KIGQ)

Lat: 41.54°NLon: 87.53°WElev: 607ft.

Mostly Cloudy

69°F

21°C

Humidity 86%
Wind Speed Calm
Barometer 30.11 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 15 Aug 7:15 am CDT
Extended Forecast for

Calumet City IL

  • Today

    Today: Mostly sunny, with a high near 91. South wind around 5 mph.

    High: 91 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 73. South wind around 5 mph becoming calm  in the evening.

    Low: 73 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 94. Heat index values as high as 103. South southwest wind 5 to 10 mph.

    High: 94 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am.  Mostly cloudy, with a low around 75. South southwest wind around 5 mph becoming west northwest after midnight.

    Low: 75 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly before 10am.  Mostly sunny, with a high near 88. Northeast wind 5 to 10 mph.

    High: 88 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 94.

    High: 94 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 74.

    Low: 74 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms.  Mostly sunny, with a high near 88.

    High: 88 °F

    Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 91. South wind around 5 mph.
Tonight
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73. South wind around 5 mph becoming calm in the evening.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 94. Heat index values as high as 103. South southwest wind 5 to 10 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 75. South southwest wind around 5 mph becoming west northwest after midnight.
Sunday
A 30 percent chance of showers and thunderstorms, mainly before 10am. Mostly sunny, with a high near 88. Northeast wind 5 to 10 mph.
Sunday Night
Partly cloudy, with a low around 72.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Tuesday Night
Mostly cloudy, with a low around 70.
Wednesday
Partly sunny, with a high near 80.
Wednesday Night
Partly cloudy, with a low around 68.
Thursday
Sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Calumet City IL
 41.59°N 87.55°W
5:56 am CDT Aug 15, 2025
7am CDT Aug 15, 2025-6pm CDT Aug 21, 2025
 
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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