I'm not sure if the cold front that accompanied hurricane Wilma is responsible, but the weather has been quite different ever since it passed over. It is a good 10 or 15 degrees cooler, and 20% less humid... basically now the daily highs are in the mid 70's, the lows are in the low 60's, and it is "only" 60% humid. Along with clear blue skies and brilliant sunshine, this is some really beautiful weather!
I thought the change from summer to fall in Seattle was abrupt, but this was even sharper. Yesterday was almost chilly, and for the first time since I moved here, I dug out my jeans, socks, and a long sleeved T-shirt (!). I had my first hot beverage as well: a grande mocha, non-iced. :)
Today was warmer and I wore a short sleeved shirt instead. It looks like the fall will be a bit like summers in Seattle, and I am looking forward to mild weather until late Spring.