Severe Weather and Flooding Threat in the Central U.S. and Mid-Atlantic; Dangerous Heat in the West and Southern Plains

Severe thunderstorms and heavy rain are expected across the central High Plains into parts of the central and southern Plains and in the the Mid-Atlantic today. Intense, dangerous heat will persist across the West, Southwest, and Southern Plains into the end of the week. Elevated to critical fire weather conditions expected in the Great Basin and Four Corners region. Read More >

Current conditions at

Lewis University Airport (KLOT)

Lat: 41.6°NLon: 88.1°WElev: 669ft.

Fair

72°F

22°C

Humidity 53%
Wind Speed N 5 mph
Barometer 30.22 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 23 Jun 11:45 am CDT
Extended Forecast for

Romeoville IL

  • Today

    Today: Mostly sunny, with a high near 76. North northeast wind around 5 mph.

    High: 76 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 55. East wind around 5 mph becoming south after midnight.

    Low: 55 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm.  Partly sunny, with a high near 78. South wind 5 to 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Partly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 9pm.  Partly cloudy, with a low around 59. West southwest wind 5 to 10 mph.  Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely then
    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 78. West northwest wind around 5 mph, with gusts as high as 15 mph.

    High: 78 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy

  • Friday

    Friday: A 30 percent chance of showers, mainly before 1pm.  Partly sunny, with a high near 77.

    High: 77 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers after 1am.  Partly cloudy, with a low around 60.

    Low: 60 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 76. North northeast wind around 5 mph.
Tonight
Partly cloudy, with a low around 55. East wind around 5 mph becoming south after midnight.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 78. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and thunderstorms likely, mainly before 9pm. Partly cloudy, with a low around 59. West southwest wind 5 to 10 mph. Chance of precipitation is 60%.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 78. West northwest wind around 5 mph, with gusts as high as 15 mph.
Thursday Night
Mostly cloudy, with a low around 58.
Friday
A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 77.
Friday Night
A chance of showers after 1am. Partly cloudy, with a low around 60.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 66.
Sunday
Partly sunny, with a high near 87.
Sunday Night
Partly cloudy, with a low around 72.
Monday
Mostly sunny, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
Romeoville IL
 41.66°N 88.1°W
11:26 am CDT Jun 23, 2026
11am CDT Jun 23, 2026-6pm CDT Jun 29, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database