Spokane, Washington, Average Temperature, October-April Degrees Fahrenheit 1901-1921 -99 189604 37.8 0.5 189704 36.3 -1.0 189804 -99.0 -136.3 189904 33.5 -3.8 190004 40.1 2.8 190104 37.3 0.0 190204 38.7 1.4 190304 36.5 -0.8 190404 37.4 0.1 190504 39.3 2.0 190604 36.6 -0.7 190704 35.4 -1.9 190804 38.9 1.6 190904 36.3 -1.0 191004 37.2 -0.1 191104 38.3 1.0 191204 36.1 -1.2 191304 34.5 -2.8 191404 38.6 1.3 191504 38.4 1.1 191604 35.8 -1.5 191704 -99.0 -136.3 191804 39.6 2.3 191904 38.5 1.2 192004 34.1 -3.2 192104 38.0 0.7