Surprisingly, even Florida has seen subzero temperatures when the thermometer dropped to 2 degrees below zero on February 13, 1899, in Tallahassee. This occurred during an Arctic outbreak during which numerous all-time record low temperatures were set, including Washington D.C. (15 degrees below zero); Atlanta, (9 degrees below zero); and Dallas (8 degrees below zero). Flurries were even reported from Tampa to New Orleans during that massive outbreak.
The coldest temperature recorded in Hawaii is 12 degrees at the Mauna Kea Observatory, which is at an elevation of 13,796 feet, on May 17, 1979. Of course, as expected, the coldest temperature in the U.S. was set in Alaska. The mercury dropped to 80 degrees below zero on January 23, 1971 in Prospect Creek in central Alaska, north of Fairbanks. The coldest temperature recorded in the contiguous U.S. is 70 degrees below zero, measured at Rogers Pass, Montana, on January 20, 1954. The oldest record was set on January 22, 1885 on Mount Washington, New Hampshire, the highest peak in the Northeast, when the thermometer dropped to 50 degrees below zero.
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