Climate and monthly weather forecast
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, like December, is another subzero cold winter month in Juneau, Alaska, with an 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 »

Weather in February

February, the last month of the winter in Juneau, is also a subzero cold month, with an average temperature ranging between max 26.2°F (-3.2°C) and min 17.1°F (-8.3°C). In February, the average high-temperature is relatively the same as in January - a still subzero cold 26.2°F (-3.2°C). Weather in February »

Weather in March

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

Weather in April

April is a cold spring month in Juneau, Alaska, with an average temperature ranging between max 37°F (2.8°C) and min 26.4°F (-3.1°C). In Juneau, Alaska, the average high-temperature in April slightly increases from a freezing cold 29.5°F (-1.4°C) in March to a cold 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 an average temperature ranging between min 35.2°F (1.8°C) and max 47.5°F (8.6°C). In May, the average high-temperature rises from a wintry 37°F (2.8°C) in April to a frosty 47.5°F (8.6°C). Weather in May »

Weather in June

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

Weather in July

July is a moderate summer month in Juneau, Alaska, with an average temperature fluctuating between 55.8°F (13.2°C) and 45.1°F (7.3°C). 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). Weather in July »

Weather in August

August, the last month of the summer in Juneau, is also a fresh month, with an average temperature varying between 44.6°F (7°C) and 54.1°F (12.3°C). In August, the average high-temperature is almost 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 still a chilly month, with temperature in the range of an average high of 48.2°F (9°C) and an average low of 39.7°F (4.3°C). In September, the average high-temperature slightly decreases from a cool 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 an average temperature fluctuating between 39°F (3.9°C) and 32.9°F (0.5°C). In Juneau, the average high-temperature in October decreases from a frosty 48.2°F (9°C) in September to a wintry 39°F (3.9°C). Weather in October »

Weather in November

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

Weather in December

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

What are the coldest months in Juneau?

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

What is the most humid month in Juneau?

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

How much does it rain in Juneau?

In Juneau, during the entire year, the rain falls for 172.4 days and collects up to 85.87" (2181mm) of precipitation.

When does it snow in Juneau?

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

How many days does it snow in Juneau?

Throughout the year, in Juneau, Alaska, there are 126.6 snowfall days, and 290.12" (7369mm) of snow is accumulated.

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

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

When is the ocean coldest in Juneau?

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

When is Daylight Saving Time (DST) in Juneau?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from AKST to AKDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from AKDT to AKST.

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. Rain falls for 18.5 days and accumulates 4.13" (105mm) of precipitation.

What is the month 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?

June through September are months without snowfall.

When are the longest days in Juneau?

The month with the longest days is June, with an average of 18h and 9min 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 in Juneau.

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 in Juneau, Alaska, is August, with an average ocean temperature of 53.4°F (11.9°C).

What is the wettest month in Juneau?

October is the month with the most rainfall in Juneau, Alaska. Rain falls for 20 days and accumulates 9.88" (251mm) of precipitation.

What is the month with the least sunshine in Juneau?

With an average of 2.6h of sunshine, November has the least sunshine of the year.

When does it snow the most in Juneau?

The month with the most snowfall in Juneau, Alaska, is December, when snow falls for 21.8 days and typically aggregates up to 62.8" (1595mm) of snow.

What is the month with the shortest days in Juneau?

December has the shortest days of the year in Juneau, Alaska, with an average of 6h and 31min of daylight.

Average temperature
Juneau, AK

Average temperature - Juneau, AK

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).

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).

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Average pressure
Juneau, AK

Average pressure - Juneau, AK

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

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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 (6.9mph).
The calmest months (with the lowest average wind speed) are June and July (3.7mph).

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Average rainfall
Juneau, AK

Average rainfall - Juneau, AK

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

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

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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).
The 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 (53.5°F).
The coldest month (with the lowest average sea temperature) is March (40.3°F).

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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: 18h and 9min).
The month with the shortest days is December (Average daylight: 6h and 31min).

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).

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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

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).

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Average visibility
Juneau, AK

Average visibility - Juneau, AK

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).

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