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

June 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 first month of the summer, June, is a comfortable month in Juneau, Alaska, with average temperature fluctuating between 46.9°F (8.3°C) and 62.2°F (16.8°C).

Temperature

In Juneau, the average high-temperature in June marginally rises, from a moderate 56.7°F (13.7°C) in May, to a comfortable 62.2°F (16.8°C). The average low-temperature,au, Alaska, is 46.9°F (8.3°C).

Humidity

In June, the average relative humidity is 78.3%.

Rainfall

In Juneau, during June, the rain falls for 15.8 days and regularly aggregates up to 3.2" (82.3mm) of precipitation. Throughout the year, there are 229.8 rainfall days, and 62.3" (1581.6mm) of precipitation is accumulated.

Snowfall

In Juneau snow does not fall in May through September.

Ocean temperature

In June, the average ocean temperatureau, Alaska, is 47.5°F (8.6°C).
Note: 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.

Daylight

The month with the longest daysau, Alaska, is June, with an average of 18.2h of daylight.

Sunshine

The average sunshine in June is 6.3h.

UV index

June and July, with an average maximum UV index of 5, are months with the highest UV indexau. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to the Sun's UV rays for the average person.
Note: In June, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 temperature in June in Juneau?

In Juneau, in June, the average high-temperature is 62.2°F (16.8°C), and the average low-temperature is 46.9°F (8.3°C).

What is the average humidity in June in Juneau?

The average relative humidity in June in Juneau is 78.3%.

How much does it rain in Juneau in June?

In June, in Juneau, the rain falls for 15.8 days. Throughout June, 3.2" (82.3mm) of precipitation is accumulated.

When it does not snow in Juneau?

May through September are months without snowfall in Juneau, Alaska.

What is the water temperature in June in Juneau?

In Juneau, Alaska, the average seawater temperature in June is 47.5°F (8.6°C). Swimming in 47.5°F (8.6°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

When are the longest days in Juneau?

With an average of 18.2h of daylight, June has the longest days of the year.

How many hours of daylight does Juneau have in June?

In June, the average length of the day in Juneau, Alaska, is 18.2h.

How long on average sun shines in June in Juneau?

The average sunshine in June is 6.3h.

What are the months with the highest UV index in Juneau?

Months with the highest UV index in Juneau are June and July, with an average maximum UV index of 5.

What is the UV index reading in June in Juneau?

In Juneau, the average daily maximum UV index in June is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV rays.
Average temperature in June - Juneau, AK
  • Average high temperature in June: 16.8°C

The warmest month (with the highest average high temperature) is July (17.7°C).
The month with the lowest average high temperature is January (0.4°C).

  • Average low temperature in June: 8.3°C

The month with the highest average low temperature is July (10°C).
The coldest month (with the lowest average low temperature) is January (-4.6°C).

Average humidity in June - Juneau, AK
  • Average humidity in June: 78.3%

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 June - Juneau, AK
  • Average rainfall in June: 82.3mm

The wettest month (with the highest rainfall) is September (219.5mm).
The driest month (with the lowest rainfall) is April (74.7mm).

Average rainfall days in June - Juneau, AK
  • Average rainfall days in June: 15.8 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 June - Juneau, AK
  • Average snowfall in June: 0mm

The month with the highest snowfall is January (703.6mm).
Months with the lowest snowfall are May, June, July, August and September (0mm).

Average snowfall days in June - Juneau, AK
  • Average snowfall days in June: 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 June - Juneau, AK
  • Average sea temperature in June: 8.6°C

The best month for swimming (with the highest average sea temperature) is August (11.9°C).
The coldest month (with the lowest average sea temperature) is March (4.7°C).

Average daylight in June / Average sunshine in June - Juneau, AK
  • Average daylight in June: 18.2h

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 June: 6.3h

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 June - Juneau, AK
  • Average UV index in June: 5

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).