Total streamflow across the Little Calumet River was last observed at 87 cfs, and is expected to yield approximately 172 acre-ft of water today; about 104% of normal. Average streamflow for this time of year is 84 cfs, with recent peaks last observed on 2024-04-02 when daily discharge volume was observed at 2,206 cfs.

Maximum discharge along the river is currently at the Little Calumet River At South Holland reporting a streamflow rate of 46.6 cfs. However, the streamgauge with the highest stage along the river is the Little Calumet River At Munster with a gauge stage of 5.33 ft. This river is monitored from 3 different streamgauging stations along the Little Calumet River, the highest being situated at an altitude of 617 ft, the Little Calumet River At Porter.