My car registration is due today but all California DMV offices are closed (yea, we are poor), am I going to be late and be charged for it? On the other hand I never received the renewal notice so I don't know for how much I should make a check if I send one over the mail.
Your registration is good 'till the end of the month displayed on your license plate.
For future reference, renewal must be done on or BEFORE the last day of the month displayed. "Didn't receive my renewal notice" is not an acceptable excuse.
In some States you have until the end of the month without a penalty.
Try to pay it online. That works in California.
do not drive until you get your car registered or you will get a ticket and be even poorer