Climate and monthly weather forecastAdak, AK

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.

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 »