When I left for my run today Wunderground said it was 51° downtown and 31° in Wallingford. I figured it was an error. But then I ran down to Interbay, and it was at least 10-15° warmer there than up here. Running through the hills in Queen Anne the temperature seemed to vary 10° block to block just based on which side of a hill I was on.
Also, ships are to Seattle as trains are to Chicago.