Car insurance for temporary work in California?

I have a 4 months of temporary work in California and I am thinking of taking my car. My current car insurance will not cover driving for work purposes in California. What is the easiest way to get car insurance for 4 months for California?

You'll have to buy a policy out there, and cancel it when you're done.

It's not the California part that your insurer is having a hard time with - it's the "driving for work purposes". And depending on what you're doing, that can get VERY expensive.

Call some insurance companies in CA and get quotes.