I have not had to deal with rain, my problem has been the 100-105 degree temps we have in inland California during June, July, August and September.

Some other people in this thread have mentioned having their paint getting rained on while drying, and I don't recall anyone saying it ruined it, though I could see how if you had a major thunderstorm with high winds and torrential rain, that might cause problems, especially if your paint is still wet to the touch. But short of that happening, I can't really see how rain is gonna affect your paint job too much, except the humidity you get during a rain storm will probably cause drying time to take longer.

Maybe someone who has dealt with rain while painting could share their experiences, because as I said, I have not encountered that problem yet.