Heavy to Excessive Rains in The Four Corners Region and Midwest; Heat Persists in the South-Central U.S.

Repeated rounds of showers and thunderstorms could bring a flash flooding threat across the Four Corners region and from the mid-Mississippi Valley into the lower Great Lakes. Hot temperatures and high humidity will continue to challenge daily records from the Southern Plains to the lower Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

Lewis University Airport (KLOT)

Lat: 41.6°NLon: 88.1°WElev: 669ft.

Overcast

73°F

23°C

Humidity 83%
Wind Speed NE 5 mph
Barometer 30.30 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 16 Sep 1:45 pm CDT
Extended Forecast for

Romeoville IL

  • This Afternoon

    This Afternoon: Scattered showers.  Mostly cloudy, with a high near 74. Northeast wind around 10 mph.  Chance of precipitation is 30%.

    High: 74 °F

    Scattered
    Showers

  • Tonight

    Tonight: Showers and thunderstorms, mainly after 1am. Some of the storms could produce heavy rainfall.  Low around 67. Northeast wind 5 to 10 mph becoming light east northeast  in the evening. Winds could gust as high as 15 mph.  Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Low: 67 °F

    Scattered
    Showers then
    Heavy Rain

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 10am. Some of the storms could produce heavy rainfall.  High near 77. Calm wind becoming north around 5 mph in the afternoon.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 77 °F

    Heavy Rain
    then
    Scattered
    T-storms

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 64. Northeast wind around 5 mph, with gusts as high as 10 mph.

    Low: 64 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 77. East wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 77 °F

    Partly Sunny

  • Friday Night

    Friday Night: Scattered showers and thunderstorms after 1am.  Mostly cloudy, with a low around 65. Chance of precipitation is 40%.

    Low: 65 °F

    Mostly Cloudy
    then
    Scattered
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely.  Partly sunny, with a high near 83. Chance of precipitation is 70%.

    High: 83 °F

    T-storms
    Likely

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm.  Mostly cloudy, with a low around 67.

    Low: 67 °F

    Showers

  • Sunday

    Sunday: A chance of showers.  Cloudy, with a high near 73.

    High: 73 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Scattered showers. Mostly cloudy, with a high near 74. Northeast wind around 10 mph. Chance of precipitation is 30%.
Tonight
Showers and thunderstorms, mainly after 1am. Some of the storms could produce heavy rainfall. Low around 67. Northeast wind 5 to 10 mph becoming light east northeast in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Thursday
Showers and thunderstorms, mainly before 10am. Some of the storms could produce heavy rainfall. High near 77. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Mostly cloudy, with a low around 64. Northeast wind around 5 mph, with gusts as high as 10 mph.
Friday
Partly sunny, with a high near 77. East wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night
Scattered showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Saturday
Showers and thunderstorms likely. Partly sunny, with a high near 83. Chance of precipitation is 70%.
Saturday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 67.
Sunday
A chance of showers. Cloudy, with a high near 73.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Monday
A chance of showers. Mostly cloudy, with a high near 71.
Monday Night
A chance of showers. Mostly cloudy, with a low around 59.
Tuesday
A chance of showers. Mostly cloudy, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
Romeoville IL
 41.63°N 88.07°W
1:51 pm CDT Sep 16, 2026
2pm CDT Sep 16, 2026-6pm CDT Sep 22, 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