August weather forecast and climate
Juneau, AK

Blooming fireweed in Juneau, Alaska, with snowy mountain peaks in the distance
Blooming fireweed in Juneau, Alaska, with snowy mountain peaks in the distance
The last month of the summer, August, is another comfortable month in Juneau, Alaska, with average temperature fluctuating between 62.8°F (17.1°C) and 48.9°F (9.4°C).

Temperature

The average high-temperature, is 62.8°F (17.1°C), while the average low-temperature is 48.9°F (9.4°C).

Humidity

In August, the average relative humidity in Juneau, Alaska, is 84.3%.

Rainfall

In Juneau, in August, during 19.1 rainfall days, 5.7" (145.5mm) of precipitation is typically accumulated. Throughout the year, in Juneau, there are 229.8 rainfall days, and 62.3" (1581.6mm) of precipitation is accumulated.

Snowfall

Throughout the year, 86.7" (2202mm) of snow is accumulated.

Ocean temperature

With an average ocean temperature of 53.4°F (11.9°C), August is the month with the warmest seawater. Swimming in 53.4°F (11.9°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 August is 15.3h.

Sunshine

The average sunshine in Juneau is 5.2h.

UV index

The average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for average individuals.
The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. 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.

What is the temperature in August in Juneau?

In August, the average high-temperature is 62.8°F (17.1°C), and the average low-temperature is 48.9°F (9.4°C).

What is the average humidity in August in Juneau?

In Juneau, Alaska, the average relative humidity in August is 84.3%.

How much does it rain in Juneau in August?

In Juneau, Alaska, during August, the rain falls for 19.1 days and regularly aggregates up to 5.7" (145.5mm) of precipitation.

When is the ocean warmest in Juneau?

The month with the warmest seawater in Juneau is August, with an average ocean temperature of 53.4°F (11.9°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.

What is the water temperature in August in Juneau?

In August, the average ocean temperature in Juneau, Alaska, is 53.4°F (11.9°C). Swimming in 53.4°F (11.9°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 August in Juneau?

The average length of the day in August is 15.3h.

How long on average sun shines in August in Juneau?

The average sunshine in August is 5.2h.

What is the UV index reading in August in Juneau?

In Juneau, Alaska, the average daily maximum UV index in August is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from unsafe exposure to the Sun's UV rays.
Average temperature in August - Juneau, AK
  • Average high temperature in August: 62.7°F

The warmest month (with the highest average high temperature) is July (63.9°F).
The month with the lowest average high temperature is January (32.8°F).

  • Average low temperature in August: 49°F

The month with the highest average low temperature is July (50°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).

Average humidity in August - Juneau, AK
  • Average humidity in August: 84.3%

The month with the highest relative humidity is September (87.9%).
The month with the lowest relative humidity is May (76.3%).

Average rainfall in August - Juneau, AK
  • Average rainfall in August: 5.7"

Wettest months (with the highest rainfall) are September and October (8.6").
The driest month (with the lowest rainfall) is April (2.9").

Average rainfall days in August - Juneau, AK
  • Average rainfall days in August: 19.1 days

The month with the highest number of rainy days is October (23.9 days).
The month with the lowest number of rainy days is June (15.8 days).

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

The month with the highest snowfall is January (27.7").
Months with the lowest snowfall are May, June, July, August and September (0").

Average snowfall days in August - Juneau, AK
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (10.6 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average sea temperature in August - Juneau, AK
  • Average sea temperature in August: 53.5°F

The best month for swimming (with the highest average sea temperature) is August (53.5°F).
The coldest month (with the lowest average sea temperature) is March (40.3°F).

Average daylight in August / Average sunshine in August - Juneau, AK
  • Average daylight in August: 15.3h

The month with the longest days is June (Average daylight: 18.2h).
The month with shortest days is December (Average daylight: 6.5h).

  • Average sunshine in August: 5.2h

The month with most sunshine is May (Average sunshine: 7.5h).
The month with least sunshine is December (Average sunshine: 1.3h).

Average UV index in August - Juneau, AK
  • Average UV index in August: 4

Months with the highest UV index are June and July (UV index 5).
Months with the lowest UV index are January, November and December (UV index 0).

deutscheenglishespañolрусский中文