I just found this new website that tracks rental prices. It’s much better than rentometer and it actually gives out really good information about the neighborhood you are looking up.
I tested some of the rent prices, and it seems that my rents are too low! Even after my increases! So take it with a grain of salt, as you must with any information that comes your way.
The site is pretty good because it gives statistics on $/sq. ft., neighborhood crime statistics, incomes, vacancy rates, and even differentiates between types of rental units, such as SFRs vs. apartments. Good stuff.
I also read this article at calculated risk that says that the rental market in San Diego is brisk and that they expect rent price increases (although they say the opposite about Riverside and San Bernardino).