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Juneau
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Juneau (AK) Weather and Climate: A Comprehensive Guide

The temperature in Juneau can vary greatly throughout the year. The temperatures shift from mild to very cold. It also experiences much rain/snowfall throughout the year. Now, let’s break down all the climate details for a clearer picture.

Average day and night temperature

Depending on the time of the year, temperatures range from moderate to very cold in Juneau. Average daytime temperatures reach a moderate 14°C in July. In January, the coolest month of the year, temperatures drop to a very cold -2°C. At night, expect cooler temperatures, averaging -7°C during this month.

The mean minimum and maximum temperatures throughout the year

Check out our detailed temperature page for more information.

Precipitation and rainy days

Juneau has a relatively rain/snowy climate with high precipitation levels, averaging 2887 mm of rain/snowfall annually. Juneau can be quite wet during September, receiving approximately 368 mm of precipitation over 19 rainy days.

In contrast June, experiences much drier conditions, with 140 mm of rainfall, spread across 15 rainy days.

The mean monthly precipitation over the year, including rain, hail and snow

The average number of days each month with precipitation

For more details, please visit our Juneau Precipitation page.

Sunshine over the year

Juneau can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 7.7 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 1.4 hours of sunlight per day.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

Average humidity

The city experiences its highest humidity in September, reaching 87%. In April, the humidity drops to its lowest level at 76%.

Relative humidity over the year

Average wind speed

The mean wind speed over the year ranges from 3 m/s in July and August to 4 m/s in January, February, March, April, May, June, September, October, November and December.

The mean monthly wind speed over the year (meters per second)

Forecast for Juneau (AK)

Wed   Dec 18
-6°C | -12°C
E 3 m/s
almost clear and no rain

almost clear and no rain

hourly forecast
Thu   Dec 19
-1°C | -8°C
SE 4 m/s
1.1 mm
overcast and slight snow

overcast and slight snow

hourly forecast
Fri   Dec 20
3°C | -2°C
E 3 m/s
3.1 mm
broken clouds and chance of slight sleet

broken clouds and chance of slight sleet

hourly forecast
5-Day Forecast 10-Day Forecast

The best time of year to visit Juneau in the United States of America

The average rainfall figures in Juneau are quite high. Throughout the year, you have a chance of prolonged precipitation. So no matter what time of year you go, you will always have to deal with a high number of rainy days. This makes it more challenging to point out the best time of year to visit. If we needed to pick one month we would choose May which is the sunniest month of the year.

Other facts from our historical weather data:
  • Which is the warmest month in Juneau?
    July has an average maximum temperature of 14°C and is the warmest month of the year.
  • Which is the coldest month in Juneau?
    The coldest month is January with an average maximum temperature of -2°C.
  • Which is the wettest month in Juneau?
    September tops the wettest month list with 368 mm of rainfall.
  • Which is the driest month in Juneau?
    June is the driest month with 140 mm of precipitation.
  • Which is the sunniest month in Juneau?
    May is the sunniest month with an average of 230 hours of sunshine.

    • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

     

     


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