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

Weather in January

January, the same as December, in Juneau, Alaska, is another subzero cold winter month, with average temperature varying between 18.7°F (-7.4°C) and 25.7°F (-3.5°C). January and December, with an average high-temperature of 25.7°F (-3.5°C), are the coldest months. Weather in January »

Weather in February

February, the last month of the winter, in Juneau, is another freezing cold month, with temperature in the range of an average low of 17.1°F (-8.3°C) and an average high of 26.2°F (-3.2°C). In February, the average high-temperature is almost the same as in January - a still freezing cold 26.2°F (-3.2°C). Weather in February »

Weather in March

March, the first month of the spring, in Juneau, is also a subzero cold month, with temperature in the range of an average low of 19°F (-7.2°C) and an average high of 29.5°F (-1.4°C). In March, the average high-temperature is relatively the same as in February - a still subzero cold 29.5°F (-1.4°C). Weather in March »

Weather in April

April is a cold spring month in Juneau, Alaska, with average temperature fluctuating between 26.4°F (-3.1°C) and 37°F (2.8°C). In Juneau, Alaska, 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 »

Weather in May

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

Weather in June

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

Weather in July

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

Weather in August

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

Weather in September

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

Weather in October

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

Weather in November

The last month of the autumn, November, is also a subzero cold month in Juneau, Alaska, with average temperature fluctuating 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 »

Weather in December

The first month of the winter, December, is also a subzero cold month in Juneau, Alaska, with average temperature ranging between min 19°F (-7.2°C) and max 25.7°F (-3.5°C). January and December, with an average high-temperature of 25.7°F (-3.5°C), are the coldest months. Weather in December »
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FAQ

What is the coldest month in Juneau?

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

What is the most humid month in Juneau?

With an average relative humidity of 92%, January is the most humid month.

How much does it rain in Juneau?

Throughout the year, in Juneau, Alaska, 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, Alaska, 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?

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

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 in Juneau, Alaska.

What is the least humid month in Juneau?

The least humid month in Juneau, Alaska, is May, with an average relative humidity of 86%.

What is the driest month in Juneau?

May is the month with the least rainfall in Juneau, Alaska. Rain falls for 18.5 days and accumulates 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.

When it does not snow in Juneau?

In Juneau snow does not fall in June through September.

When are the longest days in Juneau?

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

What month has the most sunshine in Juneau?

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

What is the warmest month in Juneau?

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 in Juneau.

What is the month with the warmest ocean in Juneau?

The month with the warmest seawater is August, 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 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?

The month with the least sunshine in Juneau, Alaska, is November, 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?

The month with the shortest days in Juneau, Alaska, is December, with an average of 6.5h of daylight.

Average temperature
Juneau, AK

Average temperature - Juneau, AK

The warmest month (with the highest average high temperature) is July (13.2°C).
Months with the lowest average high temperature are January and December (-3.5°C).

The month with the highest average low temperature is July (7.3°C).
The coldest month (with the lowest average low temperature) is February (-8.3°C).

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Average pressure
Juneau, AK

Average pressure - Juneau, AK

The month with the highest atmospheric pressure is July (1016.8mbar).
The month with the lowest atmospheric pressure is November (1009.1mbar).

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Average wind speed
Juneau, AK

Average wind speed - Juneau, AK

The windiest month (with the highest average wind speed) is January (11.1km/h).
The calmest month (with the lowest average wind speed) is June (5.9km/h).

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Average rainfall
Juneau, AK

Average rainfall - Juneau, AK

The wettest month (with the highest rainfall) is October (251mm).
The driest month (with the least rainfall) is May (105mm).

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Average rainfall days
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).

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Average snowfall
Juneau, AK

Average snowfall - Juneau, AK

The month with the highest snowfall is December (1595mm).
Months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days
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).

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Average sea temperature
Juneau, AK

Average sea temperature - Juneau, AK

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).

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Average daylight / Average sunshine
Juneau, AK

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).

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Average sunshine days
Juneau, AK

Average sunshine days - Juneau, AK

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

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Average UV index
Juneau, AK

Average UV index - Juneau, AK

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

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Average visibility
Juneau, AK

Average visibility - Juneau, AK

Months with the highest visibility are February, March, May, June, July, August, September, October and November (7km).
Months with the lowest visibility are January, April and December (6km).

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