The cost of car insurance in California can vary greatly from one driver to another. Factors such as age, driving record, credit score, and type of vehicle can all play a role in determining your premium. In general, the average cost of car insurance in California is around $108 a month, according to the Insurance Information Institute, though this amount can vary greatly depending on a variety of factors. For example, younger drivers, those with poor credit, or those with a spotty driving record can all expect to pay more. Rates can also differ depending on which type of coverage you choose and which company you go with. Ultimately, the best way to find out how much car insurance costs in California per month is to shop around and get quotes from multiple providers. Even though it may take some extra research, it is worth it in the long run as it can save you money on your monthly premium and make your car insurance more affordable.