Traveling in July

I have friends(a couple) who are travelling to Japan in July and have asked if I wanted to join

I’m interested just for the security of going with friends(versus solo, we will be staying in different hotels though), but I’ve heard it is the absolute worst time of the year to visit with the weather. I’ve been told all the stories about the humidity, bad weather, typhoons.

Should I bother going in July? Or would I be better to wait and go by myself in a couple to a few months time?