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The coldest state in the US is Alaska. It is the most northern US state.
Florida.
Two states qualify as being outside the contigous US, Alaska & Hawaii. This means they do not make direct contact with the 48 on the main north American content.
It is not connected by land to the lower 48 US States.
North Dakota
Alaska
maine
Alaska is a state, not a city. If you're asking if the coldest city in the US is in Alaska, then probably, depending on exactly how you define "coldest city". At any given moment, it's possible (if not terribly likely) that the coldest temperature measured in any US city is for a city not in Alaska.
Maine
jamaka
Contiguous is pronounced kon teeg yew us