temperature of lake cda
1. Re: How warm is the lake. May 16, 2009, 9:36 PM. According to the USGS measuring station at the outlet of Coeur d' Alene Lake, the lake gets above 70 degrees at the beginning of July, peaks at about 75-76 degrees in the middle of August, then the temperature declines from then on. Priest and Pend Orielle lakes will likely be colder.