1. Alaska
Alaska remains in a category of its own when it comes to winter severity. The data reveals that Alaska continues to dominate as the coldest state in the US in 2025, maintaining its position with an average annual temperature of 28.1°F. Even more telling, the coldest U.S. temperature on record remains -80°F, recorded at Prospect Creek, Alaska, on January 23, 1971, a benchmark that still defines just how extreme conditions there can get.
The danger isn’t only about the numbers on a thermometer. The highest hypothermia-related death rates in the United States occur in northern states, where winter is characterized by moderate to severe cold temperatures, such as Alaska and Montana. Vast distances between towns, limited road access in many regions, and long stretches of darkness all compound the risk when temperatures plunge.
2. North Dakota
North Dakota routinely trades places with Alaska and a handful of other states atop the coldest-state rankings. North Dakota and Minnesota both claim -60°F as their all-time record lows, demonstrating the extreme nature of cold conditions that can affect these northern states. That kind of record isn’t a historical footnote either, since Arctic outbreaks continue to push the state into dangerous territory most winters.
Wide open plains mean wind has nowhere to slow down, which turns already frigid air into something far more punishing through wind chill. In North Dakota, drivers stranded on the side of the road during a winter blizzard succumb to the cold before help arrives, a grim pattern that underscores why stalled vehicles are treated as emergencies rather than inconveniences there.
3. Montana
Montana’s winter threat comes from a mix of high elevation, isolated rural roads, and temperature swings that can be dramatic even within a single day. Public health data has repeatedly flagged the state as one of the more dangerous places for cold exposure. Wyoming and Montana make the list of those states with the most cold-related deaths, according to an analysis of CDC mortality data.
Hunters and outdoor workers face particular risk here, since much of the state’s terrain puts people far from immediate help. One documented case involved a hunter caught in a mountainous area during a sudden temperature drop, a scenario that repeats with some regularity across Montana’s backcountry each season.
4. Wyoming
Wyoming shares many of Montana’s risk factors, including sparse population, high elevation, and wind that rarely lets up. It appears consistently in national rankings of both coldest average temperatures and cold-related mortality. Wyoming ranks third among the coldest states in the U.S., according to U.S. News analysis of recent climate data.
The state’s exposed high plains create conditions where wind chill can turn a merely cold day into a life-threatening one within minutes. Ranchers and travelers on isolated interstate stretches, particularly through mountain passes, remain especially vulnerable when storms roll through with little warning.
5. Minnesota
Minnesota’s reputation for brutal winters is well earned and backed by hard data. Minnesota claims -60°F as its all-time record low, a mark that places it among the coldest spots in the Lower 48. International Falls, often nicknamed the icebox of the nation, exemplifies just how far south genuinely Arctic conditions can reach.
International Falls, Minnesota, had an average temperature of 42.1 degrees in 2024, making it one of the coldest towns tracked anywhere in the continental United States that year. The combination of deep cold and heavy lake-effect snow off the Great Lakes region creates a winter threat that shows up in both temperature records and storm severity.
6. Maine
Maine’s northern reaches experience some of the harshest conditions in the Northeast, driven largely by cold air masses moving down from Canada. Maine, New Hampshire, and Vermont have all recorded temperatures as low as -50°F, figures that rival conditions found much farther west. The state ranked fifth among coldest states in recent U.S. News analysis.
What makes Maine notable is the split character of its winters. Coastal areas benefit from the moderating effect of the Atlantic, while inland and northern counties face genuinely severe Arctic outbreaks, sometimes within the same storm system, which complicates emergency planning across the state.
7. Idaho
Idaho’s mountainous terrain traps cold air in valleys and basins, producing some of the sharpest temperature extremes in the West. Idaho tied for sixth place among the coldest states in the U.S. in the most recent rankings, a position it has held with some consistency in recent years. The elevation effect here matters enormously, since even modest changes in altitude can mean drastically different overnight lows.
Rural communities scattered across Idaho’s central mountains often face road closures and power disruptions during severe cold snaps. Because so much of the state’s population is spread thin outside a few urban centers, response times during extreme cold events can stretch longer than residents in more densely populated states might expect.
8. Vermont
Vermont sits firmly among the coldest states in the country, a distinction tied closely to its Green Mountain terrain and northern latitude. Vermont ranked eighth in the most recent list of coldest states in the U.S., based on statewide temperature averages. Winters here bring both deep cold and heavy snowfall, a combination that strains rural infrastructure.
The state’s older housing stock and dispersed rural population add another layer of vulnerability during severe cold events. When power outages coincide with subzero temperatures, as they occasionally do during major ice storms, the risk to residents without backup heating options rises quickly.
9. New Hampshire
New Hampshire’s White Mountains produce some of the most extreme cold readings in the eastern United States. Mount Washington in New Hampshire was the coldest place in the contiguous U.S. in 2024, with an average temperature of 31.8 degrees Fahrenheit. That single peak regularly posts wind chills that rival Arctic conditions found thousands of miles to the north.
Away from the mountains, the northern regions of New Hampshire receive arctic winds from Canada, while the southeastern part of the state experiences milder winters thanks to the nearby Atlantic Ocean. This split creates a genuine planning challenge, since a single winter storm can mean manageable conditions in Concord and dangerous exposure risk just an hour north.
10. South Dakota
South Dakota’s exposure to open plains and fast-moving Arctic fronts makes it a frequent site of severe cold and blizzard conditions. Historical cold-mortality data has flagged the state repeatedly, including cases where blizzard conditions directly contributed to hypothermia deaths in populated areas, not just remote rural stretches. An autopsy in one Rapid City case concluded that a woman had died of hypothermia during a blizzard that hit the city and much of western South Dakota.
What makes South Dakota’s winter threat distinct is how quickly conditions can shift from manageable to dangerous. A clear, merely cold morning can become a whiteout with plunging temperatures within hours, catching drivers and outdoor workers off guard even when forecasts had offered some warning.
11. New Mexico
New Mexico surprises many people when it turns up on lists of dangerous winter states, given its desert reputation. Yet its high-elevation terrain produces some of the sharpest day-to-night temperature swings in the country. In the desert plateaus of northwestern New Mexico, temperatures drop precipitously from daytime highs to nighttime lows, and the abrupt decline is lethal for more than a few.
Federal health researchers have specifically flagged this pattern as a distinct risk category separate from the sustained Arctic cold found in states like Alaska or Montana. Western states, where profound declines in nighttime temperatures may occur at high elevations, such as New Mexico, also see elevated hypothermia-related death rates. The risk hits hardest among people without reliable indoor heating or shelter overnight.
12. Colorado
Colorado rounds out the list, driven largely by its extreme mountain elevations and the volatility of high-altitude weather systems. Colorado ranked tenth among the coldest states in the U.S. in recent analysis, though its record lows tell a more dramatic story. Colorado has recorded temperatures as low as -61°F, one of the coldest readings ever logged outside Alaska.
Mountain passes and high-altitude towns face conditions that can shift violently within a single afternoon, trapping travelers unprepared for sudden Arctic air. Ski resort communities generally manage the cold well thanks to infrastructure built for it, but rural mountain roads and less-traveled backcountry areas remain genuinely hazardous when temperatures crash alongside high winds.
Across all twelve of these states, a common thread emerges: the danger rarely comes from cold alone. It comes from isolation, wind, sudden temperature swings, and the gap between how prepared people think they are and how quickly conditions can turn. National data continues to show the toll adding up each winter, with hypothermia deaths having risen nationwide, with about 2,520 Americans dying in the most recent year with complete data, up roughly 35 percent from a decade earlier. That trend, layered on top of the specific geographic and climatic risks in these twelve states, is a reminder that extreme cold remains one of the more underestimated hazards American winters still deliver.
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