Hi +@ti2d,
Yes, it seems the weather varies greatly from day to day on Fuji and clouds are quite common.
Steve, The high season is short, from July to the end of August, after that there are less buses/facilities available. I have even heard that in mid winter you may have to sign some kind of a disclaimer if you want to enter the area, but I did'nt meet anyone who had actually done that.
PS. Thanks for correcting my photo link.