Onyx is located in California. Onyx, California has a population of 417. Onyx is less family-centric than the surrounding county with 5% households with children. The county percentage for households with children is 38%.
The median household income in Onyx, California is $29,691. The median household income for the surrounding county is $56,488 compared to the national median of $66,222. The median age of people living in Onyx is 58.4 years.
The average high temperature in July is 94.38 degrees, with an average low temperature in January of 29.41 degrees. The annual precipitation is 14.14.