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

Risks of Severe Thunderstorms and Excessive Rainfall; Fire Weather Concerns and Record Warmth

Severe thunderstorms and flash flooding risks increase across the center of the nation today. Meanwhile, ongoing thunderstorms and flash flooding will linger along the Gulf Coast states through the evening. The Great Basin and Intermountain West, warm temperatures and dry fuels with dry lightning may enhance fire weather potential. In addition, across interior Alaska, Red Flag Warning are posted. Read More >

Hazardous Weather Conditions

Current conditions at

Lewis University Airport (KLOT)

Lat: 41.6°NLon: 88.1°WElev: 669ft.

A Few Clouds

77°F

25°C

Humidity 44%
Wind Speed W 14 G 22 mph
Barometer 29.95 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 20 Jun 4:45 pm CDT
Extended Forecast for

Mokena IL

  • Tonight

    Tonight: Partly cloudy, with a low around 58. West northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 15 mph.

    Low: 58 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 4pm. High near 72. East southeast wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 72 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before midnight, then showers likely. Low around 57. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.

    Low: 57 °F

    Showers

  • Monday

    Monday: A 20 percent chance of showers before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 72. North northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 72 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 53. North wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Clear
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 76.

    High: 76 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 58. West northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 15 mph.
Sunday
Showers, with thunderstorms also possible after 4pm. High near 72. East southeast wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday Night
Showers and possibly a thunderstorm before midnight, then showers likely. Low around 57. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
Monday
A 20 percent chance of showers before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 72. North northeast wind around 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 53. North wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 57.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 56.
Friday
Mostly sunny, with a high near 79.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 59.
Saturday
A chance of showers. Mostly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mokena IL
 41.52°N 87.88°W
Last Update:
2:52 pm CDT Jun 20, 2026
Forecast Valid:
5pm CDT Jun 20, 2026-6pm CDT Jun 27, 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