Monthly 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
January, like December, is a freezing cold winter month in Juneau, Alaska, with average temperature fluctuating between 25.7°F (-3.5°C) and 18.7°F (-7.4°C). The coldest months are January and December, with an average high-temperature of 25.7°F (-3.5°C). Weather in January »

The last month of the winter, February, is another freezing cold month in Juneau, Alaska, with average temperature varying between 26.2°F (-3.2°C) and 17.1°F (-8.3°C). In February, the average high-temperature is practically the same as in January - a still subzero cold 26.2°F (-3.2°C). Weather in February »

The first month of the spring, March, is still a freezing cold month in Juneau, Alaska, with average temperature ranging between max 29.5°F (-1.4°C) and min 19°F (-7.2°C). In March, the average high-temperature is essentially the same as in February - a still subzero cold 29.5°F (-1.4°C). Weather in March »

April in Juneau, Alaska, is a wintry spring month, with average temperature ranging between max 37°F (2.8°C) and min 26.4°F (-3.1°C). In April, the average high-temperature slightly increases, from a freezing cold 29.5°F (-1.4°C) in March, to a wintry 37°F (2.8°C). Weather in April »

May, the last month of the spring, in Juneau, is a chilly month, with average temperature ranging between min 35.2°F (1.8°C) and max 47.5°F (8.6°C). In Juneau, the average high-temperature in May increases, from a wintry 37°F (2.8°C) in April, to a frosty 47.5°F (8.6°C). Weather in May »

June, the first month of the summer, in Juneau, is a fresh month, with temperature in the range of an average high of 51.6°F (10.9°C) and an average low of 40.6°F (4.8°C). In Juneau, the average high-temperature is almost the same as in May - a cool 51.6°F (10.9°C). Weather in June »

July in Juneau, Alaska, is a moderate summer month, with average temperature ranging between max 55.8°F (13.2°C) and min 45.1°F (7.3°C). With an average high-temperature of 55.8°F (13.2°C) and an average low-temperature of 45.1°F (7.3°C), July is the warmest month. Weather in July »

August, the last month of the summer, in Juneau, is also a fresh month, with average temperature fluctuating between 54.1°F (12.3°C) and 44.6°F (7°C). In August, the average high-temperature is practically the same as in July - a cool 54.1°F (12.3°C). Weather in August »

The first month of the autumn, September, is also a frosty month in Juneau, Alaska, with average temperature fluctuating between 39.7°F (4.3°C) and 48.2°F (9°C). In Juneau, the average high-temperature marginally drops, from a fresh 54.1°F (12.3°C) in August, to a chilly 48.2°F (9°C). Weather in September »

October, the same as September, is a wintry autumn month in Juneau, Alaska, with average temperature varying between 39°F (3.9°C) and 32.9°F (0.5°C). In Juneau, the average high-temperature drops, from a chilly 48.2°F (9°C) in September, to a wintry 39°F (3.9°C). Weather in October »

The last month of the autumn, November, is another freezing cold month in Juneau, Alaska, with average temperature varying between 23.7°F (-4.6°C) and 29.8°F (-1.2°C). In November, the average high-temperature drops, from a cold 39°F (3.9°C) in October, to a subzero cold 29.8°F (-1.2°C). Weather in November »

The first month of the winter, December, is still a freezing cold month in Juneau, Alaska, with temperature in the range of an average low of 19°F (-7.2°C) and an average high of 25.7°F (-3.5°C). The coldest months are January and December, with an average high-temperature of 25.7°F (-3.5°C). Weather in December »

What is the coldest month in Juneau?

The coldest months in Juneau are January and December, with an average high-temperature of 25.7°F (-3.5°C).

What is the most humid month in Juneau?

January is the most humid month in Juneau, Alaska, with an average relative humidity of 92%.

How many days does it rain in Juneau?

Throughout the year, in Juneau, there are 172.4 rainfall days, and 85.87" (2181mm) of precipitation is accumulated.

When does it snow in Juneau?

January through May, October through December are months with snowfall in Juneau.

How much does it snow in Juneau?

In Juneau, during the entire year, snow falls for 126.6 days, and aggregates up to 290.12" (7369mm) of snow.

What is the month with the lowest UV index in Juneau?

January, April, October through December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the month with the coldest ocean in Juneau?

With an average ocean temperature of 40.5°F (4.7°C), March is the month with the coldest seawater.

What is the least humid month in Juneau?

With an average relative humidity of 86%, May is the least humid month.

What is the driest month in Juneau?

The month with the least rainfall is May when the rain falls for 18.5 days and typically collects 4.13" (105mm) of precipitation.

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

May and July, with an average maximum UV index of 3, are months with the highest UV index in Juneau.

When it does not snow in Juneau?

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

When are the longest days in Juneau?

June has the longest days of the year in Juneau, Alaska, with an average of 18.2h of daylight.

What month has the most sunshine in Juneau?

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

What is the warmest month in Juneau?

The warmest month is July, with an average high-temperature of 55.8°F (13.2°C) and an average low-temperature of 45.1°F (7.3°C).

What is the month with the warmest ocean in Juneau?

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

What is the wettest month in Juneau?

The month with the most rainfall in Juneau, Alaska, is October when the rain falls for 20 days and typically aggregates up to 9.88" (251mm) of precipitation.

What is the month with the least sunshine in Juneau?

November has the least sunshine of the year in Juneau, Alaska, with an average of 2.6h of sunshine.

What is the snowiest month in Juneau?

December is the month with the most snowfall in Juneau. Snow falls for 21.8 days and accumulates 62.8" (1595mm) of snow.

What is the month with the shortest days in Juneau?

With an average of 6.5h of daylight, December has the shortest days of the year in Juneau.
Average temperature - Juneau, AK
Average pressure - Juneau, AK

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

Average wind speed - Juneau, AK

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 rainfall - Juneau, AK
Average rainfall days - Juneau, AK

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 - Juneau, AK
Average snowfall days - Juneau, AK

The month with the highest number of snowfall days is January (21.9 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature - Juneau, AK

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 / Average sunshine - Juneau, AK

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

The month with the most sunshine is June (Average sunshine: 6.4h).
The month with the least sunshine is November (Average sunshine: 2.6h).

Average sunshine days - Juneau, AK
Average UV index - Juneau, AK
Average visibility - Juneau, AK

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