Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Lemonweir River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Lemonweir River, the highest being situated at an altitude of ft, the .

The Lemonweir River is a 55-mile long river in central Wisconsin, USA. It flows through Juneau and Monroe counties and joins the Wisconsin River near Necedah. The river was once used as a transportation route for logging and farming goods. The Lemonweir River has a watershed area of 467 square miles, and its major tributaries include the Yellow River and Bear Creek. There are three main dams along the river: the Petenwell Dam, the Castle Rock Dam, and the Lemonweir Dam. These dams provide hydroelectric power and also control flooding in the area. The Lemonweir River and its reservoirs are popular for fishing, boating, and camping, while the surrounding agricultural land is used for crops such as corn and soybeans.