Excerpt:
When summer sweat becomes too much to handle, the demand for a chilly escape route rises. That's when Bert Sperling, the owner of bestplaces.net, and his list of the top 50 "chill" and "sizzling" cities steps in, happy to offer guidance.
Using the Sperling Heat Index — a formula the author created that combines daily high temperatures, dew point and nighttime low temperatures — the site's specialists analyzed 30 years of June and July weather reports starting in 1980 through 2010 to determine the coolest and hottest metropolitan cities in the USA.
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