Is there longitudinal weight available for analyzing person across different monthly files?

If I plan to analyze individual data longitudinally by CPS person ID, is there longitudinal person weight available?

There is no longitudinal sample weight variable designed for analysis across samples. There are many different ideas about how to handle this situation. A popular approach, that you may want to use, is to divide the sample weight for each year by the number of sample years in your panel. So, for example, if you are including 5 sample years in your panel, you would divide each sample weight by 5.