The city may be so large as to change drastically from one neighborhood to the next, the weather, as you might have guessed, varies little from day to day. That said, it cools down substantially at night even during the height of summer, and as such, for their layerable flexibility, jeans are a natural go-to.
Do pack several pairs.
Denim is to Los Angeles what the color black is to New York. Ubiquitous and essential.
Do not wash your jeans.
Washing denim is passé, uncouth and robs them not only of their characteristic markings, but, over time, of their shape. Instead, follow the advice of L.A. jeans gurus A.P.C.: “Throw them in the freezer if they become intolerable in smell, but whatever you do, do not wash them.”