May weather forecast
Anchorage, AK

Wintertime in Anchorage, Alaska with mountains blanketed in snow
Wintertime in Anchorage, Alaska with mountains blanketed in snow

Weather in May

May, the last month of the spring in Anchorage, is a fresh month, with an average temperature fluctuating between 40.5°F (4.7°C) and 51.1°F (10.6°C).

Temperature

In Anchorage, the average high-temperature in May increases from a wintry 39.6°F (4.2°C) in April to a cool 51.1°F (10.6°C). In May, in Anchorage, the average low-temperature is 40.5°F (4.7°C).

Humidity

The least humid month is May, with an average relative humidity of 68%.

Rainfall

May is the month with the least rainfall. Rain falls for 11.5 days and accumulates 0.55" (14mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. May is the last month it regularly snows. During 0.3 snowfall days, Anchorage aggregates 0.12" (3mm) of snow. Throughout the year, there are 59.3 snowfall days, and 23.5" (597mm) of snow is accumulated.

Ocean temperature

In May, the average ocean temperature in Anchorage is 42.4°F (5.8°C).
Note: Swimming in 42.4°F (5.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In Anchorage, Alaska, the average length of the day in May is 17h and 33min.
On the first day of May in Anchorage, sunrise is at 5:48 am and sunset at 10:04 pm. On the last day of the month, sunrise is at 4:36 am and sunset at 11:18 pm AKDT.

Sunshine

May and June, with an average of 11.7h of sunshine, are months with the most sunshine.

UV index

In May, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In May, the average maximum UV index of 3 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the least humid month in Anchorage?

The least humid month is May, with an average relative humidity of 68%.

What is the average humidity in May in Anchorage?

In Anchorage, Alaska, the average relative humidity in May is 68%.

What is the driest month in Anchorage?

May is the month with the least rainfall in Anchorage, Alaska. Rain falls for 11.5 days and accumulates 0.55" (14mm) of precipitation.

How many days does it rain in May in Anchorage?

In Anchorage, in May, it is raining for 11.5 days, with typically 0.55" (14mm) of accumulated precipitation.

What is the last month it snows in Anchorage?

May is the last month it regularly snows in Anchorage, Alaska. During 0.3 snowfall days, in May, Anchorage aggregates 0.12" (3mm) of snow.

What is the ocean temperature in May in Anchorage?

In Anchorage, the average seawater temperature in May is 42.4°F (5.8°C). Swimming in 42.4°F (5.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

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

In May, the average day length in Anchorage, Alaska, is 17h and 33min.

When is the sunrise / sunset in May in Anchorage?

In May, on the first day of the month, sunrise is at 5:48 am and sunset at 10:04 pm. On the last day of the month, in Anchorage, Alaska, sunrise is at 4:36 am and sunset at 11:18 pm AKDT.

What are the months with the most sunshine in Anchorage?

The months with the most sunshine in Anchorage, Alaska, are May and June, with an average of 11.7h of sunshine.

How long on average sun shines in May in Anchorage?

The average sunshine duration in May in Anchorage, Alaska, is 11.7h.

What is the UV index reading in May in Anchorage?

In Anchorage, the average daily maximum UV index in May is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Anchorage, AK

Average temperature in May - Anchorage, AK
  • Average high temperature in May: 51.1°F

The warmest month (with the highest average high temperature) is July (61.9°F).
The month with the lowest average high temperature is January (20.3°F).

  • Average low temperature in May: 40.5°F

The month with the highest average low temperature is July (51.3°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).

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Average pressure in May
Anchorage, AK

Average pressure in May - Anchorage, AK
  • Average pressure in May: 29.93"Hg

The month with the highest atmospheric pressure is July (29.96"Hg).
The months with the lowest atmospheric pressure are November and December (29.67"Hg).

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Average wind speed in May
Anchorage, AK

Average wind speed in May - Anchorage, AK
  • Average wind speed in May: 5.2mph

The windiest month (with the highest average wind speed) is November (6.3mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).

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Average humidity in May
Anchorage, AK

Average humidity in May - Anchorage, AK
  • Average humidity in May: 68%

The months with the highest relative humidity are January, February and March (86%).
The month with the lowest relative humidity is May (68%).

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Average rainfall in May
Anchorage, AK

Average rainfall in May - Anchorage, AK
  • Average rainfall in May: 0.55"

The wettest month (with the highest rainfall) is September (1.93").
The driest month (with the least rainfall) is May (0.55").

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Average rainfall days in May
Anchorage, AK

Average rainfall days in May - Anchorage, AK
  • Average rainfall days in May: 11.5 days

The month with the highest number of rainy days is August (17.9 days).
The month with the least rainy days is February (7 days).

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Average snowfall in May
Anchorage, AK

Average snowfall in May - Anchorage, AK
  • Average snowfall in May: 0.12"

The month with the highest snowfall is December (5.51").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Anchorage, AK

Average snowfall days in May - Anchorage, AK
  • Average snowfall days in May: 0.3 days

The month with the highest number of snowfall days is December (11.6 days).
The months with the least snowfall days are June, July and August (0 days).

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Average sea temperature in May
Anchorage, AK

Average sea temperature in May - Anchorage, AK
  • Average sea temperature in May: 42.4°F

The best month for swimming (with the highest average sea temperature) is August (53.1°F).
The coldest month (with the lowest average sea temperature) is February (35.8°F).

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

Average daylight in May / Average sunshine in May - Anchorage, AK
  • Average daylight in May: 17h and 33min

The month with the longest days is June (Average daylight: 19h and 13min).
The month with the shortest days is December (Average daylight: 5h and 38min).

  • Average sunshine in May: 11h and 42min

The months with the most sunshine are May and June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).

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Average sunshine days in May
Anchorage, AK

Average sunshine days in May - Anchorage, AK
  • Average sunshine days in May: 16.3 days

The month with the most sunshine days is January (16.9 days).
The month with the least sunshine days is September (11.1 days).

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Average UV index in May
Anchorage, AK

Average UV index in May - Anchorage, AK
  • Average UV index in May: 3

The months with the highest UV index are June and July (UV index 4).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in May
Anchorage, AK

Average cloud cover in May - Anchorage, AK
  • Average cloud cover in May: 38

The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is May (Cloud cover 38).

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Average visibility in May
Anchorage, AK

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

The months with the highest visibility are January, February, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is March (5mi).

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