Anchorage
Alaska, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Anchorage, AK

Wintertime in Anchorage, Alaska, with mountains blanketed in snow
Wintertime in Anchorage, Alaska, with mountains blanketed in snow
May, the last month of the spring, in Anchorage, is a cool month, with average temperature fluctuating between 32°F (0°C) and 51.1°F (10.6°C).

Temperature

In May, the average high-temperature increases, from a cold 39.6°F (4.2°C) in April, to a fresh 51.1°F (10.6°C). In May, the average low-temperature is 32°F (0°C).

Humidity

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

Rainfall

The month with the least rainfall in Anchorage is May when the rain falls for 11.5 days and typically collects 0.55" (14mm) of precipitation.

Snowfall

Months with snowfall in Anchorage are January through May, September through December. May is the last month it regularly snows in Anchorage, Alaska. During 0.3 snowfall days, Anchorage aggregates 0.12" (3mm) of snow. In Anchorage, during the entire year, snow falls for 59.3 days, and aggregates up to 23.5" (597mm) of snow.

Ocean temperature

In Anchorage, the average seawater temperature in May is 42.4°F (5.8°C).
Note: Swimming in 42.4°F (5.8°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

The average length of the day in Anchorage, Alaska, is 17.6h.

Sunshine

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

UV index

In Anchorage, Alaska, the average daily maximum UV index in May is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 3 in May transform into the following instructions:
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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in May in Anchorage?

In Anchorage, Alaska, in May, the average high-temperature is 51.1°F (10.6°C), and the average low-temperature is 32°F (0°C).

What is the least humid month in Anchorage?

May is the least humid month in Anchorage, with an average relative humidity of 68%.

What is the average humidity in May in Anchorage?

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

How many days does it rain in May in Anchorage?

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

What is the driest month in Anchorage?

The month with the least rainfall is May when the rain falls for 11.5 days and typically collects 0.55" (14mm) of 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.

How cold is the water in May in Anchorage?

In Anchorage, Alaska, 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 length of the day is 17.6h.

What is the month with the most sunshine in Anchorage?

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

How long on average sun shines in May in Anchorage?

In May, the average sunshine in Anchorage is 11.7h.

What is the UV index intensity in May in Anchorage?

In May, the average daily maximum UV index in Anchorage is 3. A UV Index reading of 3 to 5 represents a medium health risk from the exposure to the Sun's UV rays.
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: 0°F

Months with the highest average low temperature are January, February, March, April, May, June, July, August, September, October, November and December (0°F).
Coldest months (with the lowest average low temperature) are January, February, March, April, May, June, July, August, September, October, November and December (0°F).

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

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

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 lowest rainfall) is May (0.55").

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 lowest number of rainy days is February (7 days).

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

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

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).
Months with the lowest number of snowfall days are June, July and August (0 days).

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).

Average daylight in May / Average sunshine in May - Anchorage, AK
  • Average daylight in May: 17.6h

The month with the longest days is June (Average daylight: 19.2h).
The month with shortest days is December (Average daylight: 5.6h).

  • Average sunshine in May: 11.7h

Months with most sunshine are May and June (Average sunshine: 11.7h).
The month with least sunshine is December (Average sunshine: 3.8h).

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

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).