I live in the Seattle area, run Kojaks front and rear. I have a Bacchetta Giro 20 that I ride the whole rainy winter. They do fine in the rain, better than you would think. Soft sand and gravel on a corner can be a bit of a problem but no worse than most slick or lightly treaded road tires, nothing I would worry about. But rain is absolutely not a problem for them.

As a bonus they're one of the fastest tires I ridden.

Me and my bike together weigh 270lbs ready to ride. I have a 60/40 f/r weight split and run them 80psi rear and 60psi front.