Shhh... don't tell ngateguy, but they're already here.
Rain? We get our share of rain, but if you look it up, other areas of the country get more rain than Seattle (esp. this year). It's been a beautiful Summer. It's clouds, fog and mist that just make it feel like we get a lot of rain.
Welcome. Go to cascade.org to find a lot of the local group rides, events, etc.