What's your perfect climate? Lots of sunshine and hot temperatures? Four distinct seasons? Lots of snow for skiing or tornadoes for storm-chasing? Or maybe that decreed by King Arthur in the Broadway musical "Camelot".
In reality, it's totally subjective with no one-size-fits-all solution. With that caveat, the Camelot Climate Index (CCI), as portrayed below, was designed (as a grad school project) to be a "pleasant" climate with mild temperatures and minimal precipitation. In its latest iteration, the primary data used are from the NCDC 30-year normals for the period 1981-2010. A complete description of the methodology can be found here. Enjoy.