Actually PGH gets the same amount of rainfall. And sunlight. Lovely.
Get fenders. They do a lot more than clothing ever will. Depends on the kind of bike you have as to what you can use.
The problem with rain clothing is that above 60F or so you just end up sweating inside the clothing and end up just as wet.
Get a clear rainjacket. They cose $20 and you can cut the sleeves off for warm weather rain and not feel bad about it.
I'm pretty partial to the Craft stuff if you can find it on sale. Pearl Izumi does does a nice job too.