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

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, in Juneau, Alaska, is another cold winter month, with temperature in the range of an average low of 23.7°F (-4.6°C) and an average high of 32.7°F (0.4°C). The coldest month is January, with an average high-temperature of 32.7°F (0.4°C) and an average low-temperature of 23.7°F (-4.6°C). Weather in January »
February, the last month of the winter, in Juneau, is also a wintry month, with temperature in the range of an average low of 25°F (-3.9°C) and an average high of 35.2°F (1.8°C). In February, the average high-temperature is relatively the same as in January - a still wintry 35.2°F (1.8°C). Weather in February »

The first month of the spring, March, is also a wintry month in Juneau, Alaska, with average temperature ranging between max 39.6°F (4.2°C) and min 28°F (-2.2°C). In March, the average high-temperature is almost the same as in February - a still cold 39.6°F (4.2°C). Weather in March »

April is a frosty spring month in Juneau, Alaska, with average temperature fluctuating between 33.3°F (0.7°C) and 48.4°F (9.1°C). In Juneau, the average high-temperature slightly increases, from a cold 39.6°F (4.2°C) in March, to a frosty 48.4°F (9.1°C). Weather in April »

The last month of the spring, May, is a moderate month in Juneau, Alaska, with average temperature ranging between max 56.7°F (13.7°C) and min 40.6°F (4.8°C). In Juneau, the average high-temperature in May marginally rises, from a frosty 48.4°F (9.1°C) in April, to a mild 56.7°F (13.7°C). Weather in May »

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). 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). Weather in June »

July, like June, in Juneau, Alaska, is another enjoyable summer month, with temperature in the range of an average high of 63.9°F (17.7°C) and an average low of 50°F (10°C). The warmest month is July, with an average high-temperature of 63.9°F (17.7°C) and an average low-temperature of 50°F (10°C). Weather in July »

August, the last month of the summer, in Juneau, is another comfortable month, with average temperature fluctuating between 62.8°F (17.1°C) and 48.9°F (9.4°C). In August, the average high-temperature is practically the same as in July - a still comfortable 62.8°F (17.1°C). Weather in August »

September, the first month of the autumn, in Juneau, is still a mild month, with average temperature fluctuating between 55.8°F (13.2°C) and 44.4°F (6.9°C). In September, the average high-temperature slightly decreases, from an enjoyable 62.8°F (17.1°C) in August, to a mild 55.8°F (13.2°C). Weather in September »

October, the same as September, in Juneau, Alaska, is a frosty autumn month, with temperature in the range of an average low of 37.8°F (3.2°C) and an average high of 46.9°F (8.3°C). In October, the average high-temperature slightly decreases, from a mild 55.8°F (13.2°C) in September, to a frosty 46.9°F (8.3°C). Weather in October »

November, the last month of the autumn, in Juneau, is also a wintry month, with average temperature varying between 29.1°F (-1.6°C) and 37.8°F (3.2°C). In Juneau, Alaska, the average high-temperature drops, from a frosty 46.9°F (8.3°C) in October, to a wintry 37.8°F (3.2°C). Weather in November »

The first month of the winter, December, is still a cold month in Juneau, Alaska, with average temperature ranging between min 25.5°F (-3.6°C) and max 34.2°F (1.2°C). In Juneau, the average high-temperature in December is relatively the same as in November - a still wintry 34.2°F (1.2°C). Weather in December »

What is the coldest month in Juneau?

January is the coldest month, with an average high-temperature of 32.7°F (0.4°C) and an average low-temperature of 23.7°F (-4.6°C).

How many days does it rain in Juneau?

Throughout the year, in Juneau, there are 229.8 rainfall days, and 62.3" (1581.6mm) of precipitation is accumulated.

When does it snow in Juneau?

Months with snowfall are January through April, October through December.

How many days does it snow in Juneau?

In Juneau, Alaska, during the entire year, snow falls for 43.1 days, and aggregates up to 86.7" (2202mm) of snow.

What is the snowiest month in Juneau?

January is the month with the most snowfall. Snow falls for 10.6 days and accumulates 27.7" (703.6mm) of snow.

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

January, November and December, with an average maximum UV index of 0, are months with the lowest UV index in Juneau.

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 driest month in Juneau?

April is the month with the least rainfall in Juneau. Rain falls for 17 days and accumulates 2.9" (74.7mm) of precipitation.

What is the least humid month in Juneau?

With an average relative humidity of 76.3%, May is the least humid month in Juneau, Alaska.

When it does not snow in Juneau?

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

What month has the most sunshine in Juneau?

May has the most sunshine of the year in Juneau, Alaska, with an average of 7.5h of sunshine.

When are the longest days in Juneau?

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

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

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

What is the warmest month in Juneau?

The warmest month is July, with an average high-temperature of 63.9°F (17.7°C) and an average low-temperature of 50°F (10°C).

What month is the ocean warmest 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 most humid month in Juneau?

September is the most humid month, with an average relative humidity of 87.9%.

What is the wettest month in Juneau?

The month with the most rainfall in Juneau is September when the rain falls for 22.4 days and typically aggregates up to 8.6" (219.5mm) of precipitation.

What is the month with the shortest days in Juneau?

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

What is the month with the least sunshine in Juneau?

With an average of 1.3h of sunshine, December has the least sunshine of the year in Juneau.
Average humidity - Juneau, AK

The month with the highest relative humidity is September (87.9%).
The month with the lowest relative humidity is May (76.3%).

Average rainfall - Juneau, AK

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 - Juneau, AK

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 - Juneau, AK

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 - Juneau, AK

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 - 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).

Average daylight / Average sunshine - Juneau, AK