August weather forecast
Anchorage, AK

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

Weather in August

August manifests a change in Anchorage's weather, signaling the gradual retreat of the intense summer heat. The city witnesses a dip in temperature compared to July but still hovers within the comfortable range. As August progresses, the hours of daylight start to reduce, indicating the approach of autumn. Despite a higher amount of rainfall, visibility remains excellent, allowing locals and tourists to enjoy the city and its surroundings. As mild winds begin to blow, they carry the first hints of the upcoming fall season.

Temperature

The average high-temperature during August registers at a mild 59.5°F (15.3°C), maintaining a close resemblance to the previous month. Anchorage records a consistent low-temperature of 50°F (10°C) during August nights.

Humidity

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

Rainfall

In Anchorage, in August, during 17.9 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. In Anchorage, during the entire year, the rain falls for 139.9 days and collects up to 12.6" (320mm) of precipitation.

Snowfall

In Anchorage, snow does not fall in June through August.

Ocean temperature

August is the month with the warmest seawater in Anchorage, with an average ocean temperature of 53.1°F (11.7°C).
Note: Staying in 53.1°F (11.7°C) waters for just a few moments at 55.4°F (13°C) can be harrowing, and below 50°F (10°C) poses breathing and cold shock risks, depending on individual tolerance.

Daylight

The average length of the day in August is 15h and 43min.
On the first day of the month, sunrise is at 5:34 am and sunset at 10:37 pm. On the last day of August, sunrise is at 6:51 am and sunset at 9:07 pm AKDT.

Sunshine

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

UV index

In Anchorage, the average daily maximum UV index in August is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: During August, 3 as the daily maximum UV index converts into the following advice:
Be vigilant - Suggestions to stave off sun damage are provided. Around midday, solar radiation is most harmful; hence, exposure should be limited. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
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Frequently asked questions

What is the average August temperature in Anchorage?

The high-temperature, in August, in Anchorage, is 59.5°F (15.3°C), while the low-temperature averages to 50°F (10°C).

What is the average humidity in August in Anchorage?

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

How many days does it rain in August in Anchorage?

In Anchorage, Alaska, during August, the rain falls for 17.9 days and regularly aggregates up to 1.57" (40mm) of precipitation.

When it does not snow in Anchorage?

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

Does it snow in Anchorage in August?

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

When is the ocean warmest in Anchorage?

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

What is the ocean temperature in August in Anchorage?

In August, the average ocean temperature in Anchorage is 53.1°F (11.7°C). Swimming in 53.1°F (11.7°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Anchorage have in August?

In Anchorage, Alaska, the average day length in August is 15h and 43min.

What time are sunrise and sunset in August in Anchorage?

In August, on the first day of the month, sunrise is at 5:34 am and sunset at 10:37 pm. On the last day of the month, in Anchorage, sunrise is at 6:51 am and sunset at 9:07 pm AKDT.

How long on average sun shines in August in Anchorage?

The average sunshine duration in August in Anchorage 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 of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Anchorage, AK

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: 50°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 August
Anchorage, AK

Average pressure in August - Anchorage, AK
  • Average pressure in August: 29.86"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 August
Anchorage, AK

Average wind speed in August - Anchorage, AK
  • Average wind speed in August: 4.7mph

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 August
Anchorage, AK

Average humidity in August - Anchorage, AK
  • Average humidity in August: 78%

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 August
Anchorage, AK

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 least rainfall) is May (0.55").

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Average rainfall days in August
Anchorage, AK

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 least rainy days is February (7 days).

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Average snowfall in August
Anchorage, AK

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

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 August
Anchorage, AK

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).
The months with the least snowfall days are June, July and August (0 days).

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Average sea temperature in August
Anchorage, AK

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).

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

Average daylight in August / Average sunshine in August - Anchorage, AK
  • Average daylight in August: 15h and 4min

The month with the longest days is June (Average daylight: 19h and 12min).
The month with the shortest days is December (Average daylight: 5h and 36min).

  • Average sunshine in August: 9h and 5min

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 August
Anchorage, AK

Average sunshine days in August - Anchorage, AK
  • Average sunshine days in August: 11.4 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 August
Anchorage, AK

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

Average cloud cover in August - Anchorage, AK
  • Average cloud cover in August: 45

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 August
Anchorage, AK

Average visibility in August - Anchorage, AK
  • Average visibility in August: 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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Anchorage, Alaska, USA

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