June weather forecast
Juneau, AK

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Blooming fireweed in Juneau, Alaska with snowy mountain peaks in the distance
Blooming fireweed in Juneau, Alaska with snowy mountain peaks in the distance

Weather in June

June is the onset of summer in Juneau, and it comes with a clear upward shift in temperatures. Snow is a thing of the past, giving way to moderate rainfall. As the city drifts into the warmest season, there are more hours of daylight than any other month. Sea temperatures also rise to a peak of 47.5°F (8.6°C), inviting a range of water-based actions. Overall, the pleasant weather and extended sunshine make June an ideal month for outdoor exploration in Juneau.

Temperature

In June, Juneau experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 47.5°F (8.6°C) in May to a fresh 51.6°F (10.9°C). Juneau records an average nighttime low of 40.6°F (4.8°C) in June.

Humidity

In Juneau, the average relative humidity in June is 88%.

Rainfall

In Juneau, in June, during 21.3 rainfall days, 4.53" (115mm) of precipitation is typically accumulated. In Juneau, Alaska, during the entire year, the rain falls for 172.4 days and collects up to 85.87" (2181mm) of precipitation.

Snowfall

In Juneau, snow does not fall in June through September.

Ocean temperature

In June, the average ocean temperature is 47.5°F (8.6°C).
Note: Staying in 47.5°F (8.6°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

June has the longest days of the year, with an average of 18h and 12min of daylight.
On the first day of the month, sunrise is at 4:00 am and sunset at 9:50 pm. On the last day of June, in Juneau, sunrise is at 3:57 am and sunset at 10:06 pm AKDT.

Sunshine

With an average of 6.4h of sunshine, June has the most sunshine of the year.

UV index

In Juneau, the average daily maximum UV index in June is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: A typical high UV index of 2 in June suggests the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.

Frequently asked questions

What are the temperatures in June?

In Juneau, in June, the average high-temperature is 51.6°F (10.9°C), and the average low-temperature is 40.6°F (4.8°C).

What is the average humidity in June?

In June, the average relative humidity is 88%.

How many days does it rain in June?

In Juneau, in June, during 21.3 rainfall days, 4.53" (115mm) of precipitation is typically accumulated.

When it does not snow?

In Juneau, snow does not fall in June through September.

Does it snow in June?

In June, it doesn't snow. May is the latest month when it typically snows.

How cold is the water in June?

In Juneau, in June, the average water temperature 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?

The month with the longest days is June, with an average of 18h and 12min of daylight.

What is the average length of the day in June?

In June, the average day length is 18h and 9min.

When is the sunrise / sunset in June?

On the first day of June in Juneau, sunrise is at 4:00 am and sunset at 9:50 pm. On the last day of the month, sunrise is at 3:57 am and sunset at 10:06 pm AKDT.

What month has the most sunshine?

The month with the most sunshine is June, with an average of 6.4h of sunshine.

How long on average sun shines in June in Juneau?

In Juneau, the average sunshine duration in June is 6.4h.

What is the UV index reading in June?

The average daily maximum UV index in June is 2. A UV Index estimate of 2, and below, represents a low health threat from exposure to the Sun's UV radiation.
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 June
Juneau, AK

Average temperature in June - Juneau, AK
  • Average high temperature in June: 51.6°F

The warmest month (with the highest average high temperature) is July (55.8°F).
The months with the lowest average high temperature are January and December (25.7°F).

  • Average low temperature in June: 40.6°F

The month with the highest average low temperature is July (45.1°F).
The coldest month (with the lowest average low temperature) is February (17.1°F).

Average pressure in June
Juneau, AK

Average pressure in June - Juneau, AK
  • Average pressure in June: 29.96"Hg

The month with the highest atmospheric pressure is July (30.03"Hg).
The month with the lowest atmospheric pressure is November (29.8"Hg).

Average wind speed in June
Juneau, AK

Average wind speed in June - Juneau, AK
  • Average wind speed in June: 3.7mph

The windiest month (with the highest average wind speed) is January (6.9mph).
The calmest months (with the lowest average wind speed) are June and July (3.7mph).

Average humidity in June
Juneau, AK

Average humidity in June - Juneau, AK
  • Average humidity in June: 88%

The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (86%).

Average rainfall in June
Juneau, AK

Average rainfall in June - Juneau, AK
  • Average rainfall in June: 4.53"

The wettest month (with the highest rainfall) is October (9.88").
The driest month (with the least rainfall) is May (4.13").

Average rainfall days in June
Juneau, AK

Average rainfall days in June - Juneau, AK
  • Average rainfall days in June: 21.3 days

The month with the highest number of rainy days is September (21.9 days).
The month with the least rainy days is February (4.8 days).

Average snowfall in June
Juneau, AK

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

The month with the highest snowfall is December (62.8").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in June
Juneau, AK

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

Average sea temperature in June
Juneau, AK

Average sea temperature in June - Juneau, AK
  • Average sea temperature in June: 47.5°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 June /
Average sunshine in June
Juneau, AK

Average daylight in June / Average sunshine in June - Juneau, AK
  • Average daylight in June: 18h and 1min

The month with the longest days is June (Average daylight: 18h and 12min).
The month with the shortest days is December (Average daylight: 6h and 30min).

  • Average sunshine in June: 6h and 2min

The month with the most sunshine is June (Average sunshine: 6h and 24min).
The month with the least sunshine is November (Average sunshine: 2h and 36min).

Average sunshine days in June
Juneau, AK

Average sunshine days in June - Juneau, AK
  • Average sunshine days in June: 6.3 days

The month with the most sunshine days is May (10 days).
The month with the least sunshine days is November (6.1 days).

Average UV index in June
Juneau, AK

Average UV index in June - Juneau, AK
  • Average UV index in June: 2

The months with the highest UV index are May and July (UV index 3).
The months with the lowest UV index are January, April, October, November and December (UV index 1).

Average cloud cover in June
Juneau, AK

Average cloud cover in June - Juneau, AK
  • Average cloud cover in June: 70

The months with the most cloud cover are January and November (Cloud cover 72).
The month with the least cloud cover is May (Cloud cover 61).

Average visibility in June
Juneau, AK

Average visibility in June - Juneau, AK
  • Average visibility in June: 4mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).

Juneau, Alaska, USA

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