Weather forecast for: De Kalb IL
Last Update: 1:20 pm CDT Sep 5, 2026
This Afternoon: Mostly sunny, with a high near 85. North northeast wind around 10 mph, with gusts as high as 15 mph.
Tonight: Partly cloudy, with a low around 62. Northeast wind 5 to 10 mph.
Sunday: Mostly sunny, with a high near 80. East northeast wind 5 to 10 mph.
Sunday Night: Partly cloudy, with a low around 58. East wind around 5 mph, with gusts as high as 10 mph.
Labor Day: Mostly sunny, with a high near 80. Southeast wind 5 to 10 mph.
Monday Night: Partly cloudy, with a low around 60.
Tuesday: Mostly sunny, with a high near 86.
Tuesday Night: Partly cloudy, with a low around 70.
Wednesday: Partly sunny, with a high near 87.
Wednesday Night: Partly cloudy, with a low around 61.
Thursday: Mostly sunny, with a high near 79.
Thursday Night: Partly cloudy, with a low around 57.
Friday: Mostly sunny, with a high near 80.