Climate This region experiences warm and dry summers, with average monthly temperatures between 71.6 °F (22 °C) and 98.1 °F (36.7 °C). According to the Köppen Climate Classification system, Tumwater has a very warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.
climate this region experiences warm and dry summers with average monthly temperatures between 716 °f (22 °c) and 981 °f (367 °c) according to the köppen climate classification system tumwater has a very warm-summer mediterranean climate abbreviated "csb" on climate maps