I used to use a rain cape when I was in Louisiana, it catches wind like nobodies business. The one I had, had little thumb loops in the front. You put your thumbs in them, hook the hoods, and they kept the front of the cape from flapping. I would think that a cape coupled with rainmates would be a workable solution for that climate.

In Maine, I switched over to the J&G breathable rain jacket, not quite as much ventilation as with the cape. I am a big fan of Rainmates. I have some full coverage rain pants for very heavy rain/cold temps. 95% of the time the Rainmates are all I really want or need.

I also have some waterproof/breathable gloves. I hate cold fingers.