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

Hazardous Weather Conditions

Current conditions at

Lewis University Airport (KLOT)

Lat: 41.6°NLon: 88.1°WElev: 669ft.

Fair

73°F

23°C

Humidity 53%
Wind Speed S 17 G 22 mph
Barometer 29.85 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 15 May 6:45 pm CDT
Extended Forecast for

Downers Grove IL

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 61. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Mostly Clear
    then Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 83. Southeast wind around 10 mph becoming west southwest in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 40%.

    High: 83 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Southwest wind around 5 mph becoming south southeast after midnight.

    Low: 62 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms before 10am. Partly sunny, with a high near 86. Breezy, with a south wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 86 °F

    Slight Chance
    T-storms then
    Mostly Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 67. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 67 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 85. Breezy. Chance of precipitation is 70%.

    High: 85 °F

    Breezy.
    Chance
    T-storms then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.

    Low: 65 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 79. Breezy.

    High: 79 °F

    Showers
    Likely and
    Breezy

  • Tuesday Night

    Tuesday Night: A chance of showers before 1am. Mostly cloudy, with a low around 53.

    Low: 53 °F

    Chance
    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 61. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 83. Southeast wind around 10 mph becoming west southwest in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 40%.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Southwest wind around 5 mph becoming south southeast after midnight.
Sunday
A 20 percent chance of showers and thunderstorms before 10am. Partly sunny, with a high near 86. Breezy, with a south wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
Mostly clear, with a low around 67. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 85. Breezy. Chance of precipitation is 70%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 79. Breezy.
Tuesday Night
A chance of showers before 1am. Mostly cloudy, with a low around 53.
Wednesday
Mostly sunny, with a high near 66.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
Mostly sunny, with a high near 68.
Thursday Night
Partly cloudy, with a low around 50.
Friday
Mostly sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
Downers Grove IL
 41.78°N 88.03°W
Last Update:
1:45 pm CDT May 15, 2026
Forecast Valid:
7pm CDT May 15, 2026-6pm CDT May 22, 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