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Gustavus (AK) Weather and Climate: A Comprehensive Guide

The temperature in Gustavus can vary quite a bit throughout the year. Temperatures can be mild during the warmest months, and very cold during the cooler months. It is also known for its large amounts of rain/snowfall. Let’s explore the climate details in depth to provide you with a complete overview.

Average day and night temperature

Visitors to Gustavus can expect significant temperature changes throughout the year. Typically, daytime temperatures range from a moderate 15°C in August to a very cold 2°C in the coolest month, January. Nights are cooler, with temperatures generally dropping to -2°C, particularly during the colder months.

The mean minimum and maximum temperatures throughout the year

Check out our detailed temperature page for more information.

Precipitation and rainy days

Gustavus is known for its substantial rain/snowfall, with annual precipitation reaching 2884 mm. The climate in Gustavus shows significant variation throughout the year. Expect heavy rainfall in October, with an average of 367 mm of precipitation over 23 rainy days.

In contrast, June offers drier and sunnier days, with around 127 mm of rainfall over 13 rainy days.

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

For more details, please visit our Gustavus Precipitation page.

Sunshine over the year

For those who appreciate different seasons, Gustavus serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 7.7 hours of sunshine daily, and embrace the darker days in December, offering only 1.4 hours of daily sunlight.

Monthly hours of sunshine

Data from: Juneau, the United States of America (67 KM, 41 Miles).

Daily hours of sunshine

Data from: Juneau, the United States of America (67 KM, 41 Miles).

Forecast for Gustavus (AK)

Wed   Dec 18
-1°C | -5°C
E 2 m/s
almost clear and no rain

almost clear and no rain

Thu   Dec 19
3°C | -5°C
S 3 m/s
0.9 mm
overcast and slight snow

overcast and slight snow

Fri   Dec 20
7°C | 2°C
NW 3 m/s
broken clouds and no rain

broken clouds and no rain

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

The average rainfall figures in Gustavus 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:
  • When is winter in Gustavus?
    The coldest season / winter is in the following months: January, February, March and December.
  • Which is the warmest month in Gustavus?
    August has an average maximum temperature of 15°C and is the warmest month of the year.
  • Which is the coldest month in Gustavus?
    The coldest month is January with an average maximum temperature of 2°C.
  • Which is the wettest month in Gustavus?
    October tops the wettest month list with 367 mm of rainfall.
  • Which is the driest month in Gustavus?
    June is the driest month with 127 mm of precipitation.
  • Which is the sunniest month in Gustavus?
    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.