The dog is said to have been in an area of ancient ruins in the city of Chihuahua, Mexico, in the late 1800s. How they actually got there is a mystery that cannot be answered for lack of witnesses, but there is speculation about their descent (1, 2).
Seattle's climate is classified as oceanic or temperate marine, with cool, wet winters and mild, relatively dry summers. The city and environs are part of USDA hardiness zone 8b, with isolated coastal pockets falling under 9a.
Averages for Seattle in November. November in Seattle is officially the beginning of the winter season. Expect a lot of wet weather coming from over cast skies that allow very little sun into the city during this season. There is also an increased chance of fog and snow, however, any such weather should clear up quickly.