National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Weather and Heavy Rainfall from the Midwest to the Ohio Valley; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall threats will persist from the Midwest to Lower Great Lakes through Monday, shifting into the Ohio Valley and Central Appalachians Monday evening into Tuesday. Mid-summer heat will continue across much of the CONUS this week, with record highs possible well into the 100s across the south-central High Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Lewis University Airport (KLOT)

Lat: 41.6°NLon: 88.1°WElev: 669ft.

Mostly Cloudy

79°F

26°C

Humidity 100%
Wind Speed E 10 mph
Barometer 29.91 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 9 Aug 6:45 pm CDT
Extended Forecast for

Bolingbrook IL

Flood Watch August 9, 09:00pm until August 10, 07:00am
Click here for hazard details and duration
Flood Watch

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 1am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 71. South wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.

    Low: 71 °F

    Heavy Rain

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 84. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 84 °F

    Partly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: Showers and thunderstorms likely, mainly after 3am. Mostly cloudy, with a low around 68. East wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 68 °F

    T-storms
    Likely

  • Tuesday

    Tuesday: Showers and thunderstorms likely before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 83. North northwest wind around 5 mph becoming south in the morning. Winds could gust as high as 10 mph. Chance of precipitation is 70%.

    High: 83 °F

    T-storms
    Likely then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 69. West southwest wind around 5 mph becoming east in the evening. Chance of precipitation is 70%.

    Low: 69 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 82. Chance of precipitation is 50%.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 67.

    Low: 67 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of showers after 1am. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Showers and thunderstorms likely, mainly before 1am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 71. South wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.
Monday
A 40 percent chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 84. Calm wind becoming west southwest around 5 mph in the afternoon.
Monday Night
Showers and thunderstorms likely, mainly after 3am. Mostly cloudy, with a low around 68. East wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Showers and thunderstorms likely before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 83. North northwest wind around 5 mph becoming south in the morning. Winds could gust as high as 10 mph. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 69. West southwest wind around 5 mph becoming east in the evening. Chance of precipitation is 70%.
Wednesday
A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 82. Chance of precipitation is 50%.
Wednesday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 67.
Thursday
Partly sunny, with a high near 77.
Thursday Night
A chance of showers after 1am. Mostly cloudy, with a low around 63.
Friday
Partly sunny, with a high near 75.
Friday Night
A chance of showers. Mostly cloudy, with a low around 62.
Saturday
A chance of showers. Partly sunny, with a high near 76.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 64.
Sunday
A chance of showers. Partly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bolingbrook IL
 41.7°N 88.1°W
Last Update:
5:06 pm CDT Aug 9, 2026
Forecast Valid:
7pm CDT Aug 9, 2026-6pm CDT Aug 16, 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