The Anza Valley has a warm summer Mediterranean climate generally described as semiarid. The annual average temperature of Anza is 62° F, with an annual average maximum of 95° F in August and an annual average minimum temperature of 35.9° F in December. Average rainfall is approximately 14.4 inches per year, with most of the rain falling from November through April.
The Environmental Department is continuing to pursue funding to install an air quality monitoring station on the Reservation. Updates will be provided once funding is secured.