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

Lewis University Airport (KLOT)

Lat: 41.6°NLon: 88.1°WElev: 669ft.

Overcast

75°F

24°C

Humidity 89%
Wind Speed N 8 mph
Barometer 30.06 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 17 Aug 10:45 am CDT
Extended Forecast for

Romeoville IL

  • Today

    Today: Isolated showers before 4pm. Mostly sunny, with a high near 78. North wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 78 °F

    Isolated
    Showers

  • Tonight

    Tonight: Mostly clear, with a low around 61. West northwest wind around 5 mph becoming calm.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers before 10am, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 79. West southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 79 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely before 4am, then a chance of showers. Mostly cloudy, with a low around 66. Southwest wind around 5 mph becoming west northwest after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 70%.

    Low: 66 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Partly sunny, with a high near 78. North northwest wind around 5 mph.

    High: 78 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

Detailed Forecast

Today
Isolated showers before 4pm. Mostly sunny, with a high near 78. North wind 5 to 10 mph. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 61. West northwest wind around 5 mph becoming calm.
Tuesday
A chance of showers before 10am, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 79. West southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Tuesday Night
Showers and thunderstorms likely before 4am, then a chance of showers. Mostly cloudy, with a low around 66. Southwest wind around 5 mph becoming west northwest after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 70%.
Wednesday
Partly sunny, with a high near 78. North northwest wind around 5 mph.
Wednesday Night
Partly cloudy, with a low around 62.
Thursday
Sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 78.
Friday Night
Partly cloudy, with a low around 62.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 60.
Sunday
Mostly sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Romeoville IL
 41.66°N 88.1°W
Last Update:
10:42 am CDT Aug 17, 2026
Forecast Valid:
11am CDT Aug 17, 2026-6pm CDT Aug 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