Whether it was the late tipoff or the rare snowstorm outside, Arizona (22-4, 10-4 Pac-12) was sluggish at the start, needing nearly 12 minutes just to crack double figures. Once they got rolling, the Wildcats didn't stop, revving up the rowdy crowd inside McKale Center with fastbreak layups and tenacious defense.
Nick Johnson added 12 points, five assists and keyed a second-half run that put the game out of reach.
Washington (14-13, 6-8) failed to take advantage of Arizona's slow start thanks to a tough night on offense.
The Huskies shot 30 percent and were 1 of 11 from 3-point range to lose their fifth straight road game. C.J. Wilcox had 15 points and Abdul Gaddy added 12.