7-Day Forecast 41.94°N 88.76°W (Text-Only)
NWS Forecast for: De Kalb IL
Issued by: National Weather Service Chicago, IL
Last Update: 4:12 pm CDT Jul 15, 2025




Tonight: A slight chance of showers between 7pm and 8pm. Partly cloudy, with a low around 71. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

Wednesday: Showers and thunderstorms likely, mainly after 4pm. Partly sunny, with a high near 89. Heat index values as high as 98. South southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night: Showers and thunderstorms likely, mainly before 1am. Increasing clouds, with a low around 66. West southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 73. North wind around 10 mph, with gusts as high as 15 mph.

Thursday Night: Mostly cloudy, with a low around 55. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.

Friday: Mostly sunny, with a high near 78.

Friday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62.

Saturday: Showers and thunderstorms likely, mainly before 1pm. Mostly cloudy, with a high near 83.

Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 66.

Sunday: A chance of showers and thunderstorms. Partly sunny, with a high near 82.

Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 63.

Monday: A chance of showers and thunderstorms. Partly sunny, with a high near 83.

Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 67.

Tuesday: Mostly sunny, with a high near 86.



De Kalb IL
 41.94°N 88.76°W

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