During meteorological summer, defined as June through August, several U.S. cities from the East Coast to California either tied or set records for the hottest temperatures on any day in the past seven decades of record-keeping. During meteorological summer, defined as June through August, several U.S. cities from the East Coast to California either tied or set records for the hottest temperatures on any day in the past seven decades of record-keeping. Environment Phys.org – latest science and technology news stories