Yeah, a simple waterproof rain jacket will work to keep the wet off. I'd be wary of random China produced hardshells. They are advertised as being "waterproof" but that could be total bunk.
No matter what you buy, the general idea for living in inclement weather is to layer.
Base Layer - against your skin, best to be moisture wicking
Warmth Layer - designed to insulate and hold body heat in
Waterproof Layer - keeps water, snow, wind off of your insulation layer and body in general.
The great thing about Goretex and other waterproof but breathable materials is that they keep water from the outside out, but allow heat and moisture generated by your body to pass through. Totally waterproof, non-breathable materials trap perspiration and make it seems like it's raining inside your jacket when you start to heat up. Layers like this are great for keeping out a downpour, but not so great when you're actually hiking or doing anything physical.