How cold is the USA? That is a common question for travellers heading there for the first time, and the honest answer is that it depends enormously on where you are going. The country spans an extraordinary range of climates, and a January trip to Miami and a January trip to Fairbanks are not comparable experiences.
Some areas stay warm year-round, like Florida and southern California. Others endure severe winters, particularly across the northern tier and the interior. Summers in most of the country can be genuinely hot, which surprises people who associate the northern states only with cold.
This guide covers the coldest states and cities, the record temperatures, why certain regions get so much colder than their latitude suggests, and how American homes are heated against it.
The Short Answer
| Question | Answer |
|---|---|
| Coldest state | Alaska, by a wide margin |
| Coldest state in the lower 48 | North Dakota or Minnesota, depending on the measure |
| Coldest large city | Fairbanks, Alaska |
| Coldest city in the lower 48 | International Falls, Minnesota |
| Lowest temperature ever recorded | -80°F (-62°C), Prospect Creek, Alaska, 1971 |
| Lowest in the lower 48 | -70°F (-57°C), Rogers Pass, Montana, 1954 |
The Coldest States
Ranked by average annual temperature. Figures vary slightly depending on the dataset and period used, so treat the order as more reliable than the exact numbers.
| Rank | State | Approx. annual average | Record low |
|---|---|---|---|
| 1 | Alaska | 26°F (-3°C) | -80°F (-62°C) |
| 2 | North Dakota | 40°F (4°C) | -60°F (-51°C) |
| 3 | Minnesota | 41°F (5°C) | -60°F (-51°C) |
| 4 | Maine | 41°F (5°C) | -50°F (-46°C) |
| 5 | Wyoming | 42°F (6°C) | -66°F (-54°C) |
| 6 | Montana | 43°F (6°C) | -70°F (-57°C) |
| 7 | Vermont | 43°F (6°C) | -50°F (-46°C) |
| 8 | Wisconsin | 44°F (7°C) | -55°F (-48°C) |
| 9 | South Dakota | 45°F (7°C) | -58°F (-50°C) |
| 10 | New Hampshire | 45°F (7°C) | -47°F (-44°C) |
Notice that the two columns do not agree. Montana holds the lower 48 record at -70°F yet has a warmer annual average than North Dakota, because Montana’s record was set at a mountain pass rather than anywhere people live in numbers. Records reflect one extraordinary reading at one location. Averages describe the state.
Alaska
No other state comes close, and Alaska is really several climates rather than one.
Fairbanks and the interior
Fairbanks holds the title as the coldest large city in the USA. Its average annual temperature is around 30.4°F (-0.9°C), with January averaging about -4°F (-20°C) and winter lows commonly reaching -40°F (-40°C) or below.
The reason is geography rather than latitude alone. Fairbanks sits in a valley surrounded by mountains, which shelters it from strong winds but also traps cold air near the ground. This produces temperature inversions, where cold air pools at the surface while warmer air sits above it, exactly the reverse of the normal arrangement.
Inversions have a second consequence. Because the trapped air does not mix, pollution also accumulates near the surface, and Fairbanks experiences genuine winter air quality problems despite its small population. Wood smoke from home heating is the main contributor, and it has nowhere to disperse to.
Utqiaġvik, formerly Barrow
The northernmost city in the United States, sitting above the Arctic Circle on the Arctic Ocean coast.
The coastal position moderates the extremes compared with the interior, so Utqiaġvik is not as cold as Fairbanks at its worst. What it has instead is duration and darkness. The sun does not rise for roughly two months in winter, and does not set for around three months in summer.
Prospect Creek
A former pipeline camp rather than a settlement, and the site of the lowest temperature ever recorded in the United States: -80°F (-62°C) on 23 January 1971.
Anchorage
Worth mentioning because it surprises people. Anchorage, where roughly 40% of Alaskans live, has milder winters than Minneapolis, with January averages around 18°F (-8°C). Coastal position and the Gulf of Alaska do the work.
The Upper Midwest
This is the coldest inhabited region of the contiguous United States, and the cold there is qualitatively different from Alaska’s.
North Dakota
Known for its vast prairies, North Dakota is home to some of the coldest cities in the contiguous United States. Four of the top ten coldest American cities, Grand Forks, Williston, Fargo, and Bismarck, are located here.
Two factors drive the extreme cold.
Wind. The open plains provide almost no shelter, and strong winds increase the wind chill so the air feels considerably colder than the thermometer reads. This is the defining difference between North Dakota cold and Alaskan interior cold, where mountains block the wind.
Location. Its northern latitude places it in a continental climate zone where cold air masses from Canada sweep south with nothing to slow them, producing extremely low winter temperatures that arrive quickly and persist.
Minnesota
Minnesota competes with North Dakota for the coldest state in the lower 48, and it contains the coldest city.
International Falls, on the Canadian border, is commonly called the Icebox of the Nation, a title it has contested with Fraser, Colorado. It sees temperatures below zero Fahrenheit regularly through winter.
Duluth, on Lake Superior, is among the coldest cities of its size in the country, though the lake moderates its extremes somewhat compared with inland locations at the same latitude.
Minneapolis-St Paul is the coldest major metropolitan area in the United States, which means several million people experience serious winter conditions rather than a handful in remote outposts.
Wisconsin, Michigan, and the Great Lakes
The Great Lakes produce a distinctive winter effect worth understanding.
Lake effect snow forms when cold air moves across relatively warmer lake water, picking up moisture and heat, then dumping enormous quantities of snow when it reaches land. Communities downwind of the lakes receive snowfall totals that neighbouring areas a short distance away never see.
Marquette, Michigan, on the shore of Lake Superior, is among the snowiest cities in the country for exactly this reason. The lakes also moderate temperature in early winter, then stop doing so once they freeze.
Montana and Wyoming
Mountain states where elevation adds to latitude.
Montana holds the lower 48 record at -70°F (-57°C), set at Rogers Pass on 20 January 1954. Wyoming has recorded -66°F. Both states experience enormous temperature swings, and Montana in particular is known for chinook winds that can raise temperatures dozens of degrees within hours.
New England
Maine, Vermont, and New Hampshire all appear among the coldest states, though the character of the cold differs from the Midwest.
New England cold is damper, because of Atlantic proximity, and often accompanied by heavy snowfall from coastal storms known as nor’easters. It is less extreme than the northern plains but more persistent, and the humidity makes a given temperature feel colder than the same reading in dry continental air.
Mount Washington in New Hampshire deserves a mention of its own. The observatory there recorded a wind gust of 231 mph in 1934, held as a world record for decades, and routinely experiences conditions comparable to polar regions despite sitting at a modest latitude. Its combination of cold, wind, and icing is genuinely extreme.
Wind Chill: Why the Thermometer Understates It
This matters more in the American plains than almost anywhere else, and it is frequently misunderstood.
Wind chill describes how cold the air feels on exposed skin, which is not the same as the air temperature. Moving air strips away the thin layer of warmth your body maintains at the skin surface, so heat is lost faster than in still air at the same temperature.
What wind chill does and does not do. It accelerates heat loss from people and animals, which is why frostbite times are quoted against wind chill rather than air temperature. It does not make objects colder than the actual air temperature. A pipe exposed to -10°F with a 30 mph wind will cool to -10°F faster, but not below it. This distinction matters for building protection: insulation and freeze protection are specified against the true air temperature, not the wind chill figure.
On the open plains of North Dakota, an air temperature of -20°F with a strong wind produces wind chill values well below -40°F, at which exposed skin can freeze within minutes. That is why warnings there are issued on wind chill rather than temperature alone.
The Polar Vortex
A term that has entered common use in America, frequently inaccurately.
The polar vortex is a large area of low pressure and cold air that sits over the Arctic. It is always there. It is not a storm that arrives.
What makes news is when it weakens or distorts. Normally a strong circulation keeps Arctic air contained near the pole. When that circulation is disrupted, lobes of very cold air can break away and travel far south, bringing Arctic conditions to regions that rarely experience them.
This is why Texas, Georgia, and other southern states occasionally see temperatures and ice storms their infrastructure was never designed for. The 2021 Texas event is the clearest recent example, where cold reached areas whose power generation and building stock had no cold-weather provision.
There is an active research question about whether a warming Arctic makes such disruptions more likely, which would mean a warmer world producing more frequent extreme cold outbreaks in mid-latitudes. The evidence is debated rather than settled, and worth treating as an open question rather than an established fact.
Record Low Temperatures
| Location | Temperature | Date |
|---|---|---|
| Prospect Creek, Alaska | -80°F (-62°C) | 23 January 1971 |
| Rogers Pass, Montana | -70°F (-57°C) | 20 January 1954 |
| Peter Sinks, Utah | -69°F (-56°C) | 1 February 1985 |
| Riverside R.S., Wyoming | -66°F (-54°C) | 9 February 1933 |
| Maybell, Colorado | -61°F (-52°C) | 1 February 1985 |
Peter Sinks is worth a note. It is a natural sinkhole in Utah’s Bear River Range, and it gets that cold because cold air, being denser, drains into the basin and sits there with nowhere to go. It is not a place anyone lives, but it demonstrates how terrain can produce temperatures far below what the surrounding region experiences.
How Americans Heat Their Homes
To withstand these winters, virtually every American home has a heating system. The mix differs from Europe in ways worth understanding.
| Heat source | Typical distribution | Notes |
|---|---|---|
| Natural gas furnace | Forced air through ducts | The most common arrangement nationally |
| Electric resistance | Baseboard or forced air | Common in the South, expensive to run |
| Heat pump | Forced air, or ductless mini-split | Growing rapidly, including in cold states |
| Heating oil | Boiler with radiators, or furnace | Still common in the Northeast |
| Propane | Furnace or boiler | Rural areas without gas mains |
Coal is now rare in residential heating, though it persisted longer in some regions than people assume.
Why forced air dominates
The defining feature of American residential heating is ductwork. Most homes distribute heat as warm air through ducts rather than as hot water through pipes, which is the reverse of the European pattern.
The practical consequence is that the same ducts can carry cooled air in summer, so one system handles both seasons. In a country where most of the population needs air conditioning as well as heating, that integration made sense.
The trade-offs are real though. Ducts lose heat where they run through unconditioned spaces, moving air circulates dust, and forced air produces noticeable temperature stratification with warm air collecting near the ceiling.
Where underfloor heating fits
Many homes rely on central heating systems, but underfloor heating is also an excellent option, and it is growing in American new construction.
Underfloor heating provides consistent warmth without the hot and cold spots forced air produces, and it circulates no dust. It also pairs well with a heat pump, because it operates at low water temperatures where heat pump efficiency is highest.
It can complement other systems rather than replacing them entirely. A common arrangement uses hydronic underfloor heating for the main living areas with the existing ducted system handling summer cooling, or electric mats in bathrooms as supplementary heat during the coldest periods.
Heat Pumps in Cold American Climates
This deserves its own section, because American attitudes to heat pumps in cold climates are shifting quickly and the old assumptions no longer hold.
The traditional view was that heat pumps were a southern technology, fine in Georgia and useless in Minnesota. That was accurate for the equipment available twenty years ago.
Modern cold-climate heat pumps are a different proposition. Legom air source heat pumps are engineered to operate down to -35°C (-31°F) ambient, which covers most of the populated lower 48 including Minnesota and North Dakota in typical winter conditions.
Two design elements make this work. A full DC inverter compressor raises its speed to compensate as available heat in the outdoor air falls. And demand-based defrosting clears frost from the outdoor coil only when frost is actually present, rather than on a timer, avoiding the frequent ineffective cycles that undermined earlier equipment.
Two honest qualifications. Output declines as ambient temperature falls, which is unavoidable physics for any air source unit rather than a limitation of a particular product, so cold-climate installations should be sized against the local design temperature rather than the nominal rating. And a rating of -31°F covers a great deal of the country but not Fairbanks in January. In genuinely extreme locations, ground source systems or a backup heat source remain appropriate. Being clear about that is more useful to an installer than an optimistic figure.
The efficiency case is what drives adoption. A heat pump delivers three to four units of heat per unit of electricity because it moves existing heat rather than generating it, against exactly one for electric resistance heating. In states where electric baseboard heating is common, that difference is substantial.
Practical Advice for Visitors
If you are travelling to the northern states in winter, a few things are worth knowing.
Layer rather than bulk. Several thin layers trap air between them and work better than one thick coat, and they let you adjust as you move between heated buildings and outside.
Cover the extremities. Most heat loss happens through exposed skin, so hands, ears, and face matter more than people expect. In wind chill conditions below -20°F, exposed skin can be affected within minutes.
Watch the wind chill, not the temperature. Local forecasts lead with it for good reason.
Expect very warm interiors. American buildings are typically heated more warmly than European ones, so dress in layers you can remove indoors.
Remember the summers. Minneapolis reaches 90°F in July. The same states that record -40°F in January can be genuinely hot six months later, which is continental climate at work.
“The American market is interesting right now because the assumption is changing. For years the received wisdom was that heat pumps stopped at the Mason-Dixon line, and honestly that was true of the equipment back then. It is not true of what we build now. Our units run to minus thirty-five Celsius, which covers Minnesota and North Dakota in normal winters. Where I would still be careful is interior Alaska, and I would rather say that plainly than have somebody in Fairbanks discover it in January.”
— Maggie Shen, Director of Legom
Heating Components for Cold Climates
Legom manufactures air-to-water heat pumps from 5 kW to 16 kW rated to -35°C, along with the complete hydronic system: manifolds, floor heating pipe with oxygen barrier protection, thermal actuators, room thermostats, and HVAC valves including freeze protection valves for exposed pipework.
All are produced at our facility in Jiaxing, Zhejiang Province and supplied to partners in more than 90 countries, with OEM and ODM services available across the range.
For how the USA compares internationally, see our guide to the coldest country in the world, and our article on the coldest city in the world for conditions beyond anything in North America.
Frequently Asked Questions
What is the coldest state in the USA?
Alaska, by a wide margin, with an average annual temperature around 26°F (-3°C). Among the lower 48, North Dakota and Minnesota compete for the title depending on whether you measure average temperature or number of extremely cold days. Montana holds the lower 48 record at -70°F, but that was set at a mountain pass rather than anywhere populated, which is why it does not rank higher on average temperature.
What is the coldest city in the USA?
Fairbanks, Alaska, with an average annual temperature around 30.4°F (-0.9°C) and January averaging about -4°F (-20°C). In the contiguous states, International Falls, Minnesota, is commonly called the Icebox of the Nation. Minneapolis-St Paul is the coldest major metropolitan area, which matters because it means several million people experience severe winter rather than a handful in remote outposts.
What is the lowest temperature ever recorded in the USA?
-80°F (-62°C) at Prospect Creek, Alaska, on 23 January 1971. Prospect Creek was a pipeline construction camp rather than a settlement. The record for the contiguous United States is -70°F (-57°C) at Rogers Pass, Montana, on 20 January 1954. Peter Sinks in Utah has recorded -69°F, and it reaches those temperatures because cold air drains into the sinkhole and pools with nowhere to escape.
Why is Fairbanks so much colder than Anchorage?
Geography rather than latitude. Fairbanks sits in an interior valley surrounded by mountains, which shelters it from wind but traps cold air near the ground, producing temperature inversions where cold air pools at the surface. Anchorage sits on the coast, where the Gulf of Alaska moderates the climate considerably. Anchorage has milder winters than Minneapolis, with January averages around 18°F (-8°C), which surprises most people.
What is wind chill and does it matter?
Wind chill describes how cold the air feels on exposed skin, which differs from the actual air temperature. Moving air strips away the thin layer of warmth your body maintains at the skin surface, so heat is lost faster. It matters greatly for people and animals, and frostbite warnings are issued against it. What it does not do is make objects colder than the true air temperature, which is why building insulation and freeze protection are specified against air temperature rather than wind chill.
What is the polar vortex?
A large area of low pressure and cold air that permanently sits over the Arctic. It is always there rather than something that arrives. What makes news is when the circulation containing it weakens or distorts, allowing lobes of very cold Arctic air to break away and travel far south. This is why southern states occasionally experience conditions their infrastructure was never designed for, as Texas did in 2021.
Why does North Dakota feel colder than its temperature suggests?
Wind. The open prairies provide almost no shelter, so strong winds sweep across unobstructed, dramatically increasing wind chill. An air temperature of -20°F with a strong wind produces wind chill values well below -40°F, at which exposed skin can freeze within minutes. This is the defining difference from Alaskan interior cold, where mountains block the wind and the air is often still even at far lower temperatures.
What is lake effect snow?
Snowfall produced when cold air moves across relatively warmer lake water, picking up moisture and heat, then releasing enormous quantities of snow on reaching land. Communities downwind of the Great Lakes receive totals that areas a short distance away never see. Marquette, Michigan, on Lake Superior, is among the snowiest cities in the country for this reason. The lakes also moderate temperature in early winter, then stop doing so once they freeze over.
How do Americans heat their homes?
Natural gas is the most common heat source nationally, followed by electricity. Heating oil remains common in the Northeast, and propane serves rural areas without gas mains. The defining feature is distribution: most American homes use forced air through ductwork rather than hot water through pipes, which is the reverse of the European pattern. The advantage is that the same ducts carry cooled air in summer, so one system handles both seasons.
Do heat pumps work in cold American states?
Modern cold-climate units work far better than their reputation. The old assumption that heat pumps were a southern technology was accurate for equipment available twenty years ago but no longer is. Legom units are engineered to operate down to -35°C (-31°F), which covers most of the populated lower 48 including Minnesota and North Dakota in typical winters. Output does decline as temperature falls, so systems should be sized against local design temperature, and interior Alaska remains beyond the range.
Which is colder, the USA or Canada?
Canada, by national average, at around -5.6°C against roughly 8°C for the USA. The comparison is unbalanced though, because the United States extends much further south, with Florida and southern California pulling the average up. If you compare only the northern tier against southern Canada, the two are broadly similar, and Alaska contains territory as cold as anything in Canada outside the Arctic archipelago.
When is the coldest time of year in the USA?
Generally mid-January through early February, though it varies by region. The coldest recorded temperatures in Alaska, Montana, Wyoming, and Utah were all set in January or early February. This lags behind the winter solstice in December because the ground and oceans continue releasing stored summer heat for weeks afterward, so the coldest period arrives some time after the shortest day.
Reviewed by Maggie Shen, Director at Legom, on September 14, 2026. This article was reviewed for accuracy, including verified state record temperatures, the correct distinction between wind chill and air temperature for building protection, and heat pump cold-climate operating limits.