There is an article in Golf Magazine, April 2010, page 40. They recommend wearing FJ performance light rain short, when the weather will be a mix of rain and sun. They bring up a good point, when it stops raining, the rain pants can get hot. The FJ shorts are waterproof, so they help you stay dry when it's raining and cool when the sun comes out. I didn't even know FJ made waterproof shorts. I'll have to look into this.
They also recommended a FJ DryJoys baseball cap, which is waterproof.