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Contents
- The climate of Adak
- The best time to visit Adak
- The worst time to visit Adak
- Spring weather in Adak
- Summer weather in Adak
- Autumn weather in Adak
- Winter weather in Adak
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Rocks amid golden-brown plants in the fall overlooking a large lake in Adak, Alaska
The climate of Adak
Adak, a city located in Alaska, USA, experiences a Marine west coast climate with cool summers, also known as the Köppen climate classification Cfc. Throughout the year, this climate classification is characterized by relatively uniform temperatures, high humidity, and ample rainfall. While summers are cool, winters are milder than might be expected for its northern location, thanks to the moderating effects of the ocean.
With a monthly average high temperature hovering between 36.9°F (2.7°C) in January to around 52°F (11.1°C) in August, summers in Adak are typically cooler than one might anticipate. Low temperatures mostly range from 34.2°F (1.2°C) to 49.6°F (9.8°C) throughout the year, indicating tempered variation in the annual temperature spectrum.
Humidity levels are relatively high throughout the year, with the percentage of relative humidity fluctuating from 76% to 94%. Rainfall and snowfall also play a significant role in defining the city’s climate. Precipitation is distributed throughout the year, but the volume fluctuates between months, from a low of 1.3" (33mm) in June to a high of 2.8" (71mm) in February. Significantly, Adak receives snowfall even in the winter months, with the highest snowfall of 4.72" (120mm) seen in January.
With a monthly average high temperature hovering between 36.9°F (2.7°C) in January to around 52°F (11.1°C) in August, summers in Adak are typically cooler than one might anticipate. Low temperatures mostly range from 34.2°F (1.2°C) to 49.6°F (9.8°C) throughout the year, indicating tempered variation in the annual temperature spectrum.
Humidity levels are relatively high throughout the year, with the percentage of relative humidity fluctuating from 76% to 94%. Rainfall and snowfall also play a significant role in defining the city’s climate. Precipitation is distributed throughout the year, but the volume fluctuates between months, from a low of 1.3" (33mm) in June to a high of 2.8" (71mm) in February. Significantly, Adak receives snowfall even in the winter months, with the highest snowfall of 4.72" (120mm) seen in January.
The best time to visit Adak
Unless experiencing cold and damp weather is a personal preference, it would be fair to recommend the months of June and July as the most suitable time to visit Adak. These months represent the peak of the city’s brief and cool summer, boasting high temperatures from 45.9°F (7.7°C) to 49.6°F (9.8°C). Also, the duration of daylight is at its maximum, reaching nearly 16.6 hours per day in June. Additionally, wind speeds are lower compared to other months and visibility stretches up to six miles.
The worst time to visit Adak
Considering the climate conditions, January and February may prove to be challenging months for visitors not accustomed to cold weather. During this period, the city faces its coldest temperatures, with nights falling to as low as 34°F (1.1°C). Coupled with an average of 4.72" (120mm) of snowfall in January and wind speeds of up to 21.2mph (34.1km/h) in February, the conditions can be daunting, making these months less favorable for a visit.
Spring weather in Adak
Spring in Adak extends from March to May. Although still chilly, temperatures start to slightly increase during these months, with the average highs climbing from 37°F (2.8°C) in March to 41.7°F (5.4°C) in May. Nevertheless, spring in Adak sees both rain and snow, with rainfall averaging around 2.03" (52mm) and an average snowfall of 1.68" (43mm) from March to May. An anomaly in the average wind speed is observed as it decreases from 19.6mph (31.5km/h) in March to 14.7mph (23.7km/h) in May.
Summer weather in Adak
The summer months, from June to August, mark the warmest season in Adak. Average high temperatures range from 45.9°F (7.7°C) to 52°F (11.1°C), while lows fluctuate between 42.8°F (6°C) and 49.6°F (9.8°C). Notably, daylight hours peak during June with 16.6 hours per day. While rainfall can still be expected, averaging around 1.7" (43mm) over the summer, snowfall is absent.
Autumn weather in Adak
Autumn in Adak typically spans from September to November. The weather during this time is increasingly cooler, with temperatures progressively falling from 50.5°F (10.3°C) in September to 41.9°F (5.5°C) in November. Rainfall continues to be a constant factor, averaging 2.38" (60mm) in Autumn, while the occurrence of snowfall resurfaces with an average of 0.25" (6mm) in November. With decreasing daylight hours, from 14.6 hours in August to 8.8 hours in November, days become noticeably shorter.
Winter weather in Adak
Characterized by cold weather, increased snowfall, and reduced daylight hours, winter in Adak starts in December. The temperature typically drops to an average high of 38.8°F (3.8°C) in December and an average low of 36.1°F (2.3°C) in February. Snowfall levels reach up to 4.72" (120mm) in January, and daylight hours are significantly lower, averaging at only 7.9 hours in December. This period also witnesses an uptick in wind speeds, with the highest wind gust speed reaching 28.3mph (45.5km/h) in February.
Weather in January
Adak, Alaska, greets January with the height of its winter season. The city is draped in white, with snowfall averaging 4.72" (120mm). It's a strong contrast to the fairly mild temperatures of the previous month, with temperatures settling closer to freezing. Weather in January »
Weather in February
As the calendar flips to February, there's a slight increase in weather shift in Adak, Alaska. Steady winds prevail this month, ranging from 21.2mph (34.1km/h) to a gusty peak of 30.2mph (48.6km/h), making it the windiest month of the year. Weather in February »
Weather in March
Witness as winter starts to lose its grip in March when the city of Adak, Alaska, receives more sunlight than in previous months. Trees still stay bare, awaiting the spring bloom, and the air remains brisk. The month stands out with a big shift from a windy February, as wind speeds moderate noticeably. Weather in March »
Weather in April
Arriving at April, the weather in Adak, Alaska, steps into spring, setting the snowfall aside, replaced with rainfall. April witnesses a considerable reduction in snowfall, dwindling from March’s 3.43" (87mm) to a mere 1.61" (41mm). Weather in April »
Weather in May
May brings about distinctly milder weather to Adak, Alaska. With a significant rise in both high and low temperatures, Alaska embraces spring in its full swing. It's the rainiest period of the year; rain clouds often cover the city with the highest humidity levels of 88%. Weather in May »
Weather in June
June is a promising month in Adak, Alaska, signaling the onset of the much-welcomed summer, with almost no traces left of the snowy winter. The daylight hours peak, staying above the horizon for up to 16.6 hours. The month also stands out with the most sunshine days, with 12.8 sunny days in June. Weather in June »
Weather in July
In the middle of the year, July presents Adak, Alaska, with the height of summer temperatures, surging up to a toasty 49.6°F (9.8°C). The city also sets its record for the highest relative humidity, a soaring 94%. The days remain long and are often sunny, giving residents plenty of time for activities. Weather in July »
Weather in August
As August enters the scene in Adak, Alaska, it carries onwards the warmth of July. The weather can get hot at times, but it never reaches the sweltering temperatures seen elsewhere in the USA. The rainfall increases when compared to the month of July but seems consistent with the general summer trend. Weather in August »
Weather in September
September in Adak, Alaska, marks the commencement of the cooling period leading into autumn. There's a slight, observable decline in temperatures from the peak in August to the cooler averages of September. As summer bows out, the heavy rainfall also sees a reduction, making way for clearer days. Weather in September »
Weather in October
In October, Adak, Alaska transitions to a colder climate and less daylight. The city observes gusty winds, ramping up to a peak of 27.1mph (43.6km/h), marking October as a windy month. As it departs from September's milder weather, temperatures drop, making room for chilly autumn air. Weather in October »
Weather in November
In November, Adak, Alaska, steps tentatively into the threshold of winter. It is noticeably colder and holds a higher possibility of snowfall. The incoming winter season makes itself noticed with an increase in wind speed, measuring up to a gusty 29mph (46.7km/h). Weather in November »
Weather in December
December ushers in the height of winter for Adak, Alaska. Snowfall rises from November's 0.71" (18mm) to a much denser 2.56" (65mm), signaling the true start of winter. Despite the chill, December can still surprise with clear and beautiful winter days. Weather in December »
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
January, characterized by an average high temperature of 36.9°F (2.7°C) and a low temperature of 34.2°F (1.2°C), is generally the coldest month.
What are the least humid months?
January and December, with an average relative humidity of 76%, are the least humid months in Adak.
How many days does it rain?
Throughout the year, in Adak, there are 173.3 rainfall days, and 27.4" (696mm) of precipitation is accumulated.
When does it snow?
January through May, October through December are months with snowfall.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 12.2 days and typically aggregates up to 4.72" (120mm) of snow.
How much does it snow?
Throughout the year, there are 53.7 snowfall days, and 16.3" (414mm) of snow is accumulated.
When is the lowest UV index?
January through April and December, with an average maximum UV index of 1, are months with the lowest UV index in Adak.
What is the rainiest month?
February is the month with the most rainfall. Rain falls for 9.2 days and accumulates 2.8" (71mm) of precipitation.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from HST to HDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from HDT to HST.
What is the driest month in Adak?
June is the month with the least rainfall. Rain falls for 13.8 days and accumulates 1.3" (33mm) of precipitation.
When it does not snow?
In Adak, Alaska, snow does not fall in June through September.
When are the longest days?
With an average of 16h and 36min of daylight, June has the longest days of the year.
What is the most humid month?
With an average relative humidity of 94%, July is the most humid month.
What are the months with the highest UV index?
The months with the highest UV index are July through September, with an average maximum UV index of 3.
What time of the year is the hottest?
In Adak, Alaska, temperatures reach their average annual highs in August, measuring 52°F (11.1°C) and a minimum average of 49.6°F (9.8°C).
What month has the most sunshine?
The month with the most sunshine is October, with an average of 5.1h of sunshine.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 7h and 54min of daylight.
What is the month with the least sunshine?
The month with the least sunshine is December, with an average of 2.1h of sunshine.
Average temperature
Adak, AK
The warmest month (with the highest average high temperature) is August (52°F).
The month with the lowest average high temperature is January (36.9°F).
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is March (33.8°F).
Average pressure
Adak, AK
- Average pressure in January:
29.48"Hg - Average pressure in February:
29.6"Hg - Average pressure in March:
29.77"Hg - Average pressure in April:
29.73"Hg - Average pressure in May:
29.83"Hg - Average pressure in June:
29.87"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.84"Hg - Average pressure in October:
29.7"Hg - Average pressure in November:
29.77"Hg - Average pressure in December:
29.53"Hg
The month with the highest atmospheric pressure is July (29.95"Hg).
The month with the lowest atmospheric pressure is January (29.48"Hg).
Average wind speed
Adak, AK
- Average wind speed in January:
18.8mph - Average wind speed in February:
21.2mph - Average wind speed in March:
19.6mph - Average wind speed in April:
17.8mph - Average wind speed in May:
14.7mph - Average wind speed in June:
12.2mph
- Average wind speed in July:
11.1mph - Average wind speed in August:
12.1mph - Average wind speed in September:
15.7mph - Average wind speed in October:
18.8mph - Average wind speed in November:
20.1mph - Average wind speed in December:
20.4mph
The windiest month (with the highest average wind speed) is February (21.2mph).
The calmest month (with the lowest average wind speed) is July (11.1mph).
Average humidity
Adak, AK
The month with the highest relative humidity is July (94%).
The months with the lowest relative humidity are January and December (76%).
Average rainfall
Adak, AK
- Average rainfall in January:
2.56" - Average rainfall in February:
2.8" - Average rainfall in March:
2.52" - Average rainfall in April:
1.73" - Average rainfall in May:
1.85" - Average rainfall in June:
1.3"
The wettest month (with the highest rainfall) is February (2.8").
The driest month (with the least rainfall) is June (1.3").
Average rainfall days
Adak, AK
- Average rainfall days in January:
9.1 days - Average rainfall days in February:
9.2 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
11.9 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
17.9 days - Average rainfall days in August:
16.3 days - Average rainfall days in September:
17 days - Average rainfall days in October:
19.5 days - Average rainfall days in November:
17 days - Average rainfall days in December:
12.5 days
The month with the highest number of rainy days is October (19.5 days).
The month with the least rainy days is January (9.1 days).
Average snowfall
Adak, AK
- Average snowfall in January:
4.72" - Average snowfall in February:
2.8" - Average snowfall in March:
3.43" - Average snowfall in April:
1.61" - Average snowfall in May:
0.43" - Average snowfall in June:
0"
The month with the highest snowfall is January (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Adak, AK
- Average snowfall days in January:
12.2 days - Average snowfall days in February:
9.4 days - Average snowfall days in March:
10 days - Average snowfall days in April:
7.8 days - Average snowfall days in May:
1.9 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.2 days - Average snowfall days in November:
2.6 days - Average snowfall days in December:
9.6 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Adak, AK
- Average daylight in January:
8h and 2min - Average daylight in February:
10h and 0min - Average daylight in March:
11h and 5min - Average daylight in April:
14h and 0min - Average daylight in May:
15h and 4min - Average daylight in June:
16h and 4min
- Average daylight in July:
16h and 1min - Average daylight in August:
14h and 4min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 4min - Average daylight in November:
8h and 5min - Average daylight in December:
7h and 5min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in January:
2h and 4min - Average sunshine in February:
2h and 5min - Average sunshine in March:
3h and 1min - Average sunshine in April:
3h and 4min - Average sunshine in May:
3h and 5min - Average sunshine in June:
4h and 1min
- Average sunshine in July:
3h and 1min - Average sunshine in August:
3h and 4min - Average sunshine in September:
4h and 2min - Average sunshine in October:
5h and 1min - Average sunshine in November:
3h and 1min - Average sunshine in December:
2h and 1min
The month with the most sunshine is October (Average sunshine: 5h and 6min).
The month with the least sunshine is December (Average sunshine: 2h and 6min).
Average sunshine days
Adak, AK
- Average sunshine days in January:
8.2 days - Average sunshine days in February:
6.3 days - Average sunshine days in March:
6.7 days - Average sunshine days in April:
8.3 days - Average sunshine days in May:
9.3 days - Average sunshine days in June:
12.8 days
- Average sunshine days in July:
9.3 days - Average sunshine days in August:
10 days - Average sunshine days in September:
10.7 days - Average sunshine days in October:
8.5 days - Average sunshine days in November:
7.4 days - Average sunshine days in December:
7.2 days
The month with the most sunshine days is June (12.8 days).
The month with the least sunshine days is February (6.3 days).
Average UV index
Adak, AK
The months with the highest UV index are July, August and September (UV index 3).
The months with the lowest UV index are January, February, March, April and December (UV index 1).
Average cloud cover
Adak, AK
The month with the most cloud cover is July (Cloud cover 85).
The month with the least cloud cover is October (Cloud cover 63).
Average visibility
Adak, AK
The months with the highest visibility are April, May, June, September, October and November (6mi).
The months with the lowest visibility are January, February, March, July, August and December (5mi).
Adak, Alaska, USA
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