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One of the places that has seen record-high temperatures is Kodiak.
The state of Alaska has recorded the hottest December day on record.
On the island of Kodiak, the temperature reached a record 19.4C (67F) on Sunday, seven degrees warmer than the previous high.
Elsewhere in Alaska, temperatures have plummeted to record lows.
The town of Ketchikan had one of the warmest Christmas days in the past century, with temperatures reaching -18C (-0.4F) on 25 December.
The weather extremes have caused warnings of an "Icemageddon", as the rain and snow have left ice as hard as cement on the roads.
Warm air coming in from Hawaii has made Alaska's air more moist. Heavy rain and snow storms are more likely in the interior regions, away from the warm coastal areas.
The region was 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217
The Alaska Department of Transportation and Public Facilities warned of the dangers of thick ice on roads.
It is difficult to remove ice from the road surface. The department said that roads were at sub-zero temperatures which caused ice to bind to the surface.
The ice would likely stay on the roads until at least March or April, according to the Climate Scientist.
The storm that hit the central city of Fairbanks over Christmas dumped more than 10in of snow, making it the snowiest mid-winter storm since 1937.
The roof of the only grocery shop in the town of Delta Junction caved in on Sunday because of the amount of snow that fell.
The blasts of warm and cold temperatures over the past two decades were a sign of climate change, according to Mr. Thoman.
"When all the pieces come together in a warming world, we're going to get these unprecedented events, that's what we expect," he said.
The cold is going to return this weekend, with temperatures in Fairbanks expected to fall to below -28C.
Warm, soggy episodes are likely to be more common in the future.
He said that the extreme precipitation events have come to the fore.
The caption is media.
"This could be gone in five to 10 years" - what Alaska's shrinking island means for all of us
Alaska.
Climate change.
The United States.
There is severe weather.
