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

August weather forecast and climate
Anchorage, AK

Wintertime in Anchorage, Alaska, with mountains blanketed in snow
Wintertime in Anchorage, Alaska, with mountains blanketed in snow
August, the last month of the summer, in Anchorage, is another mild month, with average temperature fluctuating between 59.5°F (15.3°C) and 32°F (0°C).

Temperature

In August, the average high-temperature is almost the same as in July - a mild 59.5°F (15.3°C). In Anchorage, the average low-temperature is 32°F (0°C).

Humidity

In August, the average relative humidity in Anchorage is 78%.

Rainfall

In Anchorage, it is raining for 17.9 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, there are 139.9 rainfall days, and 12.6" (320mm) of precipitation is accumulated.

Snowfall

June through August are months without snowfall in Anchorage, Alaska.

Ocean temperature

The month with the warmest seawater is August, with an average ocean temperature of 53.1°F (11.7°C).
Note: Swimming in 53.1°F (11.7°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

In Anchorage, the average length of the day in August is 15.7h.

Sunshine

In August, the average sunshine in Anchorage is 9.9h.

UV index

In Anchorage, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 3 in August transform into the following instructions:
Take precautions - Protection against sun damage is advised. 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.

What is the temperature in August in Anchorage?

In Anchorage, in August, the average high-temperature is 59.5°F (15.3°C), and the average low-temperature is 32°F (0°C).

What is the average humidity in August in Anchorage?

In August, the average relative humidity in Anchorage, Alaska, is 78%.

How much does it rain in Anchorage in August?

In Anchorage, in August, it is raining for 17.9 days, with typically 1.57" (40mm) of accumulated precipitation.

Does it snow in Anchorage in August?

In Anchorage, in August, it doesn't snow. In September, it regularly snows.

When it does not snow in Anchorage?

June through August are months without snowfall in Anchorage, Alaska.

When is the ocean warmest in Anchorage?

With an average ocean temperature of 53.1°F (11.7°C), August is the month with the warmest seawater in Anchorage.

What is the water temperature in August in Anchorage?

In Anchorage, in August, the average water temperature is 53.1°F (11.7°C). Swimming in 53.1°F (11.7°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.

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

In August, the average length of the day in Anchorage is 15.7h.

How many hours of sunshine does Anchorage have in August?

In Anchorage, the average sunshine in August is 9.9h.

What is the UV index intensity in August in Anchorage?

In August, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.
Average temperature in August - Anchorage, AK
  • Average high temperature in August: 59.5°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 August: 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 August - Anchorage, AK
  • Average humidity in August: 78%

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 August - Anchorage, AK
  • Average rainfall in August: 1.57"

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 August - Anchorage, AK
  • Average rainfall days in August: 17.9 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 August - Anchorage, AK
  • Average snowfall in August: 0"

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 August - Anchorage, AK
  • Average snowfall days in August: 0 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 August - Anchorage, AK
  • Average sea temperature in August: 53.1°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 August / Average sunshine in August - Anchorage, AK
  • Average daylight in August: 15.7h

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 August: 9.9h

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 August - Anchorage, AK
  • Average UV index in August: 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).