Alaska Temperatures Climate and Weather info (2024)

Temperatures and climate vary dramatically in Alaska

Many weather-related myths surround Alaska’s temperatures and climate. One of the most common is that Alaska temperatures in summer are cool. In fact, like much of the United States, Alaska has four seasons and weather records at both ends of the thermometer. Alaska’s summers are warm with temperatures that can reach into the 90°s. Ft. Yukon holds the all-time record with a sizzling 100°F temperature recorded in 1915. Many believe that the far northern part of Alaska would be the coldest. Actually, the record for Alaska (and the entire U.S. for that matter) was set in 1971 at Prospect Creek in the northern interior: a bone-chilling -80°F! When compared to high readings near 90°, Alaska temperatures range is an astonishing 170°.

Alaska Temperatures Climate and Weather info (1)
Wasilla Lake Photo By Dennis Zaki

Alaska’s climate is changing

The annual average temperature in Alaska has increased 3.5°F from 1949 to 2005. Temperatures have changed more in Alaska over the past 30 years than they have anywhere else on Earth: winters have warmed by a startling 5-6°F, compared with a global average of 1°F. That’s guaranteed to have dramatic effects in an Arctic landscape, where even small temperature changes can make the difference between freezing and melting. In Fairbanks, a city built on permafrost, the annual mean temperature is just 28°F. If it pops above zero, residents can say goodbye to the frozen ground beneath their feet, along with the free iceboxes in their basem*nts. The impacts on wildlife, and the people who depend on it for their livelihoods, will be huge.

Alaska Weather and Climate

Alaska’s climate is determined by average temperatures and precipitation received statewide over many years. The extratropical storm track runs along the Aleutian Island chain, across the Alaska Peninsula, and along the coastal area of the Gulf of Alaska which exposes these parts of the state to a large majority of the storms crossing the North Pacific. The climate in Juneau and the southeast panhandle is a mid-latitude oceanic climate in the southern sections and a sub Arctic oceanic climate in the northern parts.

Alaska Temperatures Climate and Weather info (2)

The climate in Southcentral Alaska is a subarctic climate due to its short, cool summers. The climate of the interior of Alaska is best described as extreme and is the best example of a true subarctic climate, as the highest and lowest recorded temperatures in Alaska have both occurred in the interior. The climate in the extreme north of Alaska is an Arctic climate with long, very cold winters and short, cool summers.

Alaska Weather Records

Lowest Temperature
-79.8° F (-62° C) at Prospect Creek on January 23, 1971.
(U.S. Record)

Highest Temperature
100° F (38° C) at Fort Yukon on June 27, 1915.

Lowest Annual Normal Temperature
9.3° F (-12.6° C) at Barrow
(U.S. Record)

Lowest Summer Normal Temperature
June–August
36.4° F (2.4° C) at Barrow
(U.S. Record)

Lowest Winter Normal Temperature
December-February
-15.7° F (-26.5° C) at Barter Island
(U.S. Record)

Southeast Coastal Zone Climate

Due to the Pacific Ocean, the climate of this zone is distinctly maritime. This means that temperatures are relatively mild, and daily variations between the high and low readings are small, with the range between 8 to 16 degrees. Periods of subfreezing temperatures seldom extend beyond ten days duration, and minimum readings of zero to -20°F are a rare occurrence. Conversely, extremely high temperatures occur infrequently during the summer months. Temperatures reach the 80°F to 85°F range nearly every year, chiefly in June, July, and August. Yet, it is not unusual for daily maximum readings to remain in the 50s during the summer months.

Alaska Temperatures Climate and Weather info (3)

In Juneau, the state capitol, extremes include a maximum of 89°F in July to a minimum of -22°F in February. This zone is located almost directly in the path of easterly moving storms that cross the Gulf of Alaska. Frequent and relatively heavy precipitation occurs, with annual amounts close to that of the immediate coastal regions of Washington and Oregon. Due to a rugged topography, precipitation amounts vary greatly in different localities, even in adjacent localities. Yakutat has an annual precipitation of around 130 inches, one of the highest in the state. June has the least precipitation of any month, while October and November are usually the wettest months. Most of the precipitation, even in the winter months, occurs in the form of rain. Some snow, mixed with rain, may fall as early as October. Snow has fallen in all months of the year except June, July, and August. However, appreciable snowfalls seldom occur after late March or before late November. Accumulated snow depths of a foot or more are infrequent and, because of moderating temperatures, snow covers seldom persist beyond a week or two. Strong southeasterly winds are frequent from October through March. Thick fogs are infrequent and of short duration.

Alaska Temperatures Climate and Weather info (4)

Southwest Coastal Zone Temperatures

This zone has a climate rather similar to that of the Southeast Coast, except that precipitation, though frequent, is not as abundant. Due to the moderating effects of the ocean, it is difficult to define any seasonal periods. The beginning of spring is in late May or early June. August is regarded as the midsummer period and autumn arrives in early October. Fog occurs frequently in the summer season, with the foggy period extending from mid-July to mid-September. During the winter months, visibility is often restricted due to blowing snow.

Southern Zone Climate

The climate in the western and southern sections of this zone is more maritime than continental in character, and that modifies the daily temperature extremes. Northern and eastern sections are predominantly continental. However, there are usually two periods during the year when the entire zone is affected by the continental climate. In June and July, temperatures rise noticeably under the influence of warmer continental air, and around late December and early January, the cold, clear continental air becomes quite dominant. Another aspect of this zone is its highly varied terrain, which exerts pronounced effects on local weather and climate. This is especially true for a place like Anchorage, where large temperature and precipitation variations can occur over relatively short distances. The four seasons are well marked.

Alaska Temperatures Climate and Weather info (5)

In the summer, high temperatures average in the 60s and low temperatures in the 50s. Temperatures in the 70s are considered very warm; seldom do high temperatures ever reach the lower or middle 80s. Rain increases after mid-June. Most days in July and August are cloudy and at least one third of them have rain. August through October is the wettest time of the year for most sections. Autumn is brief, beginning in early September and ending in mid-October. Temperatures begin to fall in September, with snow becoming more frequent in October. The average date of the last snow is mid-April, but may be as late as early May. Temperatures steadily decrease into January, when the highs are near 20°F and the lows near 5°F. The coldest weather is normally in January, when very cold days have high temperatures below zero. Average temperatures throughout the entire winter, however, are considerably higher than those experienced in the Alaskan interior (North Central zone). Mild days with temperatures in the 30s do occur. Annual snowfalls vary from about 60 to 90 inches. Freezing rain is extremely rare. Heavy fogs are infrequent and of short duration, but patchy ground fog is common during the spring and fall. In general, ice fog does not occur. Spring begins in late April and early May, when days are warm and sunny, nights are cool, and precipitation amounts are exceedingly small. Foliage turns green in most sections by late May/early June. For most sections, the average occurrence of the last freeze in spring is during the second half of May, while the first in fall is during the first half of September.

Northern Arctic Zone Temperatures

Alaska Temperatures Climate and Weather info (6)
Temperatures usually remain below the freezing point for most of the year, with daily maximums reaching higher than 32°F an average of 110 days per year. Freezing temperatures have been observed every month of the year. February is generally the coldest month. March temperatures are warmer than those observed in the other winter months, and in April, temperatures begin a general upward trend. May is a definite transitional period, and July is the warmest month of the year. During late July or early August, the Arctic Ocean usually becomes ice-free for the summer. High readings of 70°F or above have occurred on rare occasions.

The end of the short summer is reached in September. By November, about half of the daily mean temperatures are either zero or below. Thanks to a modifying effect of the ocean, the long Arctic night temperatures of the immediate coastal areas do not drop to the extreme low readings reached in the Alaskan interior. Snow covers the ground about eight months of the year, and usually falls every month of the year.For Barrow – the most northerly first-order station operated by the National Weather Service-every year the sun dips below the horizon at 12:50 p.m. on November 18, and is not seen again until 11:51 a.m. on January 24. From the 24th on, the amount of daylight increases by more than 9 minutes per day. By 1:06 a.m. on May 10, daylight has increased to 24 hours per day. The sun remains visible from that time until August 2, when it begins to set again for 1 hour and 25 minutes. The decrease in hours of daylight is as rapid as the increase. For all other areas in this zone, the sun remains below the horizon from late November until mid-January, and continuous daylight runs from the middle of May through the end of July.

Alaska Temperatures by Month

Summer Temperatures
Alaska Temperatures Climate and Weather info (7)

Alaska Precipitation by Month

Rainfall
Alaska Temperatures Climate and Weather info (8)

Here’s the Alaska NOAA weather website for more information.

Alaska Temperatures Climate and Weather info (2024)

FAQs

Alaska Temperatures Climate and Weather info? ›

The southern and coastal regions of Alaska can also be cloudy with some rain showers throughout the year, with average summer temperatures ranging from 40°F to 60°F (4° – 15°C). Winter temperatures in Alaska range from 0°F / -18°C to -30°F / -35°C from November to March.

What is the weather like in Alaska all year round? ›

Alaska's interior, a second climatic zone, has a continental climate influenced in the winter by cold air from northern Canada and Siberia. Average temperatures in the interior range from about 45 to 75 °F (7 to 24 °C) in summer and about 20 to −10 °F (−7 to −23 °C) in winter.

What is Alaska's climate like? ›

Average daytime temperatures range from 5 to 30 °F (−15 to −1.1 °C). Winter in Alaska may be cold, but the snow-draped scenes and Northern Lights are spectacular. However, if you prefer warmer weather adventures, then visiting Alaska in July will suit you best.

How cold is Alaska in summer? ›

Summer In Alaska

By July, daytime temperatures in the Interior can average in the 70° F range—although it has been known to reach well into the 90s—while temperatures in the coastal areas and higher elevations rarely get above 65° F.

What are the rainiest months in Alaska? ›

Cloudy days and the probability of precipitation start to increase after the middle of July reaching nearly 70% every day during October, which is the peak of the "wet season". This late summer transition into the wet season also has an increasing frequency of foggy mornings.

Is it expensive to live in Alaska? ›

Average Cost of Living in Alaska: $54,331 per year

Data gathered by MERIC 2022 ranked Alaska as the state with the sixth highest cost of living. (Hawaii had the highest cost of living in the whole country.)

Does Alaska have all 4 seasons? ›

Use our charts to see what the weather will be like during your Alaska vacation. Quick: What are the four seasons in Alaska? Answer: Winter, June, July, and August. That timeworn classic is only partially true--May and September can also be great summer months.

How many hours is it dark in Alaska? ›

Even though it is the largest state in the US, Alaska's population is sparse. With 24-hour daylight during the summer months and 24-hour darkness during the winter, many people find Alaska to be a strange and mysterious place. Here are some debunked myths about the unusual daylight patterns of Alaska.

Is Alaska a good place to live? ›

Living in Alaska is a truly unique and amazing experience, unlike anywhere else in the United States. This vast, rugged state offers residents an unparalleled connection to nature, with stunning landscapes that range from towering mountain ranges to pristine coastlines.

What is the hottest day in Alaska? ›

The highest and lowest recorded temperatures in Alaska are both in the Interior. The highest is 100 °F (37.8 °C) in Fort Yukon on June 27, 1915.

What is the best month to visit Alaska? ›

The best time to visit Alaska is during the summer months. While our summer season is short, it is the driest, warmest time to visit. Starting mid May and ending mid September you are sure to see the best the State of Alaska has to offer...

What is the warmest city in Alaska? ›

Alaska
  • Hottest city: Fairbanks.
  • Number of days per year w/ temperature above 90℉: 0.
  • Number of days per year w/ temperature above 100℉: 0.
  • Average summer maximum temperature: 70.6℉
  • Average summer minimum temperature: 48.9℉

What is the coldest city in Alaska? ›

While Utqiaġvik does boast the coldest average temperatures in the state, the coldest temperature ever recorded in the United States belongs to the inland weather station at Jim River. In 1971, the area recorded a temperature of -80 degrees Fahrenheit!

How do people in Alaska make money? ›

Glittering gold in Alaska's streams and mountains still lure miners to work private claims. About 15 million acres of soil in Alaska are suitable for farming, with 1 million acres currently in production. The long daylight hours of summer produce vegetables of extraordinary size.

What is Alaska warmest month? ›

While weather in Alaska can sometimes be a bit unpredictable, the summer season (mid-June through mid-August) is usually the mildest and warmest time of our year, especially in the Interior, where temperatures can reach well above 80°F / 27°C and when it is not uncommon to see temperatures reach 90°F / 33° C in ...

What animals live in Alaska? ›

To learn more, click on the species links below.
  • Bears.
  • Moose.
  • Muskoxen.
  • Wolves.
  • Wood Bison.
  • Birds.
  • Bats.
  • Beavers.

What is the best weather month in Alaska? ›

The best time to visit Alaska is during the summer months. While our summer season is short, it is the driest, warmest time to visit. Starting mid May and ending mid September you are sure to see the best the State of Alaska has to offer...

How long is it dark in Alaska? ›

Even though residents of Utqiagvik, the northernmost town in Alaska, won't see the sun for 67 days come winter, they enjoy the midnight sun all summer - over 80 days of uninterrupted daylight.

How many months does it stay warm in Alaska? ›

While weather in Alaska can sometimes be a bit unpredictable, the summer season (mid-June through mid-August) is usually the mildest and warmest time of our year, especially in the Interior, where temperatures can reach well above 80°F / 27°C and when it is not uncommon to see temperatures reach 90°F / 33° C in ...

Does Alaska get a lot of snow? ›

An average of 79 inches of snow falls on Anchorage every year (the same amount as Burlington, Vermont). But Talkeetna, only two hours north, gets considerably more snow due to the higher elevation, and Alyeska — just an hour from Anchorage — receives an average of 178 inches annually!

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