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.
There is very little rain in this season, with a lot of very hot, dry days expected, and absolutely no fog or snow predicted, so don't expect any freak turns for the worst if you're in Seattle in July. If hot and sunny weather is what you're looking for, Seattle in July is the place to be. The average daily temperature expected in Seattle in this month is 23 C (73 F) , dropping to an average temperature of 13 C (55 F) .