May weather forecast
Adak, AK

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Rocks amid golden-brown plants in the fall overlooking a large lake in Adak, Alaska
Rocks amid golden-brown plants in the fall overlooking a large lake in Adak, Alaska

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%. It's time for more outdoor walks, with longer days and increased warmth. Even lighter jackets can be left at home as the daytime temperature becomes more comfortable.

Temperature

May's onset records a minor alteration in the average high-temperature to a still wintry 41.7°F (5.4°C) from April's 38.7°F (3.7°C). Adak notes an average temperature descent to a still wintry 38.8°F (3.8°C) in May, a small shift from its daytime peak.

Humidity

In Adak, the average relative humidity in May is 88%.

Rainfall

In Adak, in May, it is raining for 16.8 days, with typically 1.85" (47mm) of accumulated precipitation. In Adak, during the entire year, the rain falls for 173.3 days and collects up to 27.4" (696mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Adak. May is the last month it regularly snows. During 1.9 snowfall days, in May, Adak aggregates 0.43" (11mm) of snow. In Adak, during the entire year, snow falls for 53.7 days and aggregates up to 16.3" (414mm) of snow.

Daylight

In Adak, the average length of the day in May is 15h and 43min.
On the first day of the month, sunrise is at 7:14 am and sunset at 10:12 pm. On the last day of May, in Adak, sunrise is at 6:32 am and sunset at 10:56 pm HDT.

Sunshine

The average sunshine in May is 3.9h.

UV index

In Adak, the average daily maximum UV index in May is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 2 in May translates into these instructions:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
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Frequently asked questions

How cold is it in Adak in May?

The high-temperature, in May, in Adak, records 41.7°F (5.4°C), while the low-temperature is 38.8°F (3.8°C).

What is the average humidity in May in Adak?

In Adak, the average relative humidity in May is 88%.

How many days does it rain in May in Adak?

In Adak, Alaska, in May, during 16.8 rainfall days, 1.85" (47mm) of precipitation is typically accumulated.

What is the last month it snows in Adak?

May is the last month it regularly snows in Adak, Alaska. During 1.9 snowfall days, in May, Adak aggregates 0.43" (11mm) of snow.

What is the average length of the day in May in Adak?

The average day length in May in Adak, Alaska, is 15h and 43min.

When are sunrise and sunset in May in Adak?

In May, on the first day of the month, sunrise is at 7:14 am and sunset at 10:12 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 10:56 pm HDT.

How many hours of sunshine does Adak have in May?

In May, the average sunshine duration is 3.9h.

How high is the UV index in May in Adak?

In May, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Adak, AK

Average temperature in May - Adak, AK
  • Average high temperature in May: 41.7°F

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).

  • Average low temperature in May: 38.8°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).

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Average pressure in May
Adak, AK

Average pressure in May - Adak, AK
  • Average pressure in May: 29.83"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).

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Average wind speed in May
Adak, AK

Average wind speed in May - Adak, AK
  • Average wind speed in May: 14.7mph

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).

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Average humidity in May
Adak, AK

Average humidity in May - Adak, AK
  • Average humidity in May: 88%

The month with the highest relative humidity is July (94%).
The months with the lowest relative humidity are January and December (76%).

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Average rainfall in May
Adak, AK

Average rainfall in May - Adak, AK
  • Average rainfall in May: 1.85"

The wettest month (with the highest rainfall) is February (2.8").
The driest month (with the least rainfall) is June (1.3").

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Average rainfall days in May
Adak, AK

Average rainfall days in May - Adak, AK
  • Average rainfall days in May: 16.8 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).

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Average snowfall in May
Adak, AK

Average snowfall in May - Adak, AK
  • Average snowfall in May: 0.43"

The month with the highest snowfall is January (4.72").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Adak, AK

Average snowfall days in May - Adak, AK
  • Average snowfall days in May: 1.9 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).

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Average daylight in May /
Average sunshine in May
Adak, AK

Average daylight in May / Average sunshine in May - Adak, AK
  • Average daylight in May: 15h and 4min

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 May: 3h and 5min

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).

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Average sunshine days in May
Adak, AK

Average sunshine days in May - Adak, AK
  • Average sunshine days in May: 9.3 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).

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Average UV index in May
Adak, AK

Average UV index in May - Adak, AK
  • Average UV index in May: 2

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).

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Average cloud cover in May
Adak, AK

Average cloud cover in May - Adak, AK
  • Average cloud cover in May: 80

The month with the most cloud cover is July (Cloud cover 85).
The month with the least cloud cover is October (Cloud cover 63).

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Average visibility in May
Adak, AK

Average visibility in May - Adak, AK
  • Average visibility in May: 6mi

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).

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Adak, Alaska, USA

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