The Coldest State
Alaska is the coldest state in the United States. Its average annual temperature sits below freezing - colder, on average, than any other state across the whole year. No other state comes close to matching it.
Why Alaska Is So Cold
The reason is mostly about location. Alaska is the northernmost state by far, reaching well up toward the Arctic. The far north of the state crosses the Arctic Circle. Being so close to the top of the globe means long, dark, bitterly cold winters and only short, cool summers in much of the state. Cold air flowing down from the Arctic keeps temperatures low.
Record-Breaking Cold
Alaska holds the record for the coldest temperature ever measured in the United States. At a remote spot in the state, the thermometer once dropped to around 80 degrees below zero Fahrenheit. The interior of Alaska, away from the moderating influence of the ocean, sees the most extreme cold. Even so, like everywhere, Alaska thaws each spring, an event eagerly awaited by its residents.
Source
This article was written using information from Wikipedia.