The ac on my 53k mile 99 accord lx 4cy cycles cold and then not so cold. I hear the compressor cycling on and off. I had a 97 accord EX 4cyl that did not do this. Is my system low on freon?

Yes, it's likely low on freon. Only have someone add freon using a manifold gauge set. This link may help:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-9.html#post1864159