 The site of the Kooskia Internment Camp (1943–45) is about upstream of Lowell on U.S. 12, on the north bank of the Lochsa River.This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above 71.6 °F.According to the Köppen Climate Classification system, Lowell has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.