Scott Hansen, aka Tycho, has produced some pitch-perfect ambient albums but “Weather” is not one of them. Epoch, his previous release, featured guitars to great effect, but on Weather he embraces short electro-pop songs and introduces vocals, the breathy lounge voice of Hannah Cottrell, both of which swing him away from effective ambience towards, frankly, boredom. “Into the Woods” is enjoyable jaunty brain fluff that fades away in lovely fashion, and the title track is an instrumental with his old emotional mix of hue and rhythm, but the other six tracks disappoint.