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

August weather forecast and climate
Unalaska, AK

The last month of the summer, August, is also a moderate month in Unalaska, Alaska, with temperature in the range of an average low of 47.7°F (8.7°C) and an average high of 58.8°F (14.9°C).

Temperature

With an average high-temperature of 58.8°F (14.9°C) and an average low-temperature of 47.7°F (8.7°C), August is the warmest month.

Rainfall

In Unalaska, in August, during 14 rainfall days, 2.7" (68.3mm) of precipitation is typically accumulated. In Unalaska, during the entire year, the rain falls for 223 days and collects up to 60.9" (1545.8mm) of precipitation.

Snowfall

In Unalaska snow does not fall in June through September.

Ocean temperature

The month with the warmest seawater is August, with an average ocean temperature of 50.2°F (10.1°C).
Note: Swimming in 50.2°F (10.1°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 Unalaska, the average length of the day is 14.7h.

Sunshine

In August, the average sunshine is 7h.

UV index

In Unalaska, the average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 5 interpret into the following advice:
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the warmest month in Unalaska?

August is the warmest month in Unalaska, with an average high-temperature of 58.8°F (14.9°C) and an average low-temperature of 47.7°F (8.7°C).

What is the temperature in August in Unalaska?

The average high-temperature, in August, in Unalaska, is 58.8°F (14.9°C), while the average low-temperature is 47.7°F (8.7°C).

How many days does it rain in August in Unalaska?

In August, in Unalaska, the rain falls for 14 days. Throughout August, 2.7" (68.3mm) of precipitation is accumulated.

When it does not snow in Unalaska?

June through September are months without snowfall.

What month is the ocean warmest in Unalaska?

The month with the warmest seawater in Unalaska is August, with an average ocean temperature of 50.2°F (10.1°C).

How cold is the water in August in Unalaska?

In Unalaska, Alaska, the average seawater temperature in August is 50.2°F (10.1°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

How many hours of daylight does Unalaska have in August?

The average length of the day in August in Unalaska is 14.7h.

How many hours of sunshine does Unalaska have in August?

In Unalaska, the average sunshine in August is 7h.

What is the UV index reading in August in Unalaska?

In Unalaska, Alaska, the average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV radiation.
Average temperature in August - Unalaska, AK
  • Average high temperature in August: 58.9°F

The warmest month (with the highest average high temperature) is August (58.9°F).
The month with the lowest average high temperature is January (36.8°F).

  • Average low temperature in August: 47.7°F

The month with the highest average low temperature is August (47.7°F).
The coldest month (with the lowest average low temperature) is February (27.6°F).

Average rainfall in August - Unalaska, AK
  • Average rainfall in August: 2.7"

The wettest month (with the highest rainfall) is December (7.9").
The driest month (with the lowest rainfall) is July (2.2").

Average rainfall days in August - Unalaska, AK
  • Average rainfall days in August: 14 days

Months with the highest number of rainy days are October, November and December (23 days).
The month with the lowest number of rainy days is July (13 days).

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

The month with the highest snowfall is January (23.8").
Months with the lowest snowfall are June, July, August and September (0").

Average sea temperature in August - Unalaska, AK
  • Average sea temperature in August: 50.1°F

The best month for swimming (with the highest average sea temperature) is August (50.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).

Average daylight in August / Average sunshine in August - Unalaska, AK
  • Average daylight in August: 14.7h

The month with the longest days is June (Average daylight: 17h).
The month with shortest days is December (Average daylight: 7.5h).

  • Average sunshine in August: 7h

Months with most sunshine are May and June (Average sunshine: 8h).
Months with least sunshine are November and December (Average sunshine: 5).

Average UV index in August - Unalaska, AK
  • Average UV index in August: 5

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January and December (UV index 0).