Min/Max Temperatures in U.S. Cities

I was recently inspired by a recent Seattle Times article heralding the Emerald City as the least air-conditioned metro area in the country.  The U.S. Census Bureau’s American Housing Survey estimates that only 1 in 3 Seattle households have the luxury as of 2015.

As Seattle resident and  AC hold out myself, my reasoning  has always been, "We're a temperate city. There's only so few days that it's insufferably hot here."  In the viz below, I dug into the last few years of climate data to see just how many "AC days" Seattle gets compared to other metros.  I also wanted to use dynamic parameters to let the user define for themselves what temperature was insufferable without AC. Is it over 75°, 72°, 80°? You can also explore the other end of the spectrum for cold days. Each city's weather is sourced from the NOAA wheather station of their international airport.