He forgot to mention that all the rain means you'll stay indoors and do more work.
Even more specifically, Softies seem to spend an awful lot of the summer going on hikes and picnics.
That said, I'd like to find out how to compare the number of days with rain in both places. Seattle gets drizzle. The year I moved here we had 86 days of continuous drizzle and no sun sightings. New York most likely gets its precipitation in the occasional downpour -- not to mention snow -- and probably has more overall sunny days during the winter. (Just a guess, though.)
http://countrystudies.us/united-states/weather/new-york/new-...
http://countrystudies.us/united-states/weather/washington/se...