Glacier Bay National Park and Preserve (AK) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Glacier Bay National Park and Preserve, Alaska, United States of America. Long-term data from 1990 to 2020 was used to calculate these averages. Now, let's explore all the details to give you a full picture.

Glacier Bay National Park and Preserve has a notably wet climate with abundant precipitation, recording 4303 mm (169 in) of rain/snowfall per year.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

The climate in Glacier Bay National Park and Preserve shows significant variation throughout the year. Expect 522 mm (21 in) of precipitation during the wettest month October, distributed over 21 snowy/rainy days.

In contrast, June offers drier and sunnier days, with around 165 mm (6.5 in) of rainfall over 12 rainy days.

October, the wettest month, has a maximum daytime temperature of 3°C (37°F). During the driest month June you can expect a temperature of 9°C (48°F). For more detailed insights into the city's temperatures, visit our Glacier Bay National Park and Preserve Temperature page.

Glacier Bay National Park and Preserve's average annual precipitation is 4303 mm (169 in). Let's compare this to some popular worldwide tourist destinations:

The climate in San Francisco, USA, is influenced by coastal weather, with 469 mm (18 in) of rainfall mostly during the winter months.

Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.

Adelaide, Australia, enjoys 511 mm (20 in) of annual precipitation, with dry summers and wet winters.

Kuala Lumpur, Malaysia, receives 2529 mm (100 in) of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.

Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.

Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.

Climate change is affecting precipitation patterns worldwide, including Glacier Bay National Park and Preserve (AK):

• Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
• Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.

• "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
• The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
• The greatest snowfall recorded was on Mt. Rainier, Washington State, USA, over 31.5 meters (103 feet) fell during the winter of 1972.

For more detailed information about Glacier Bay National Park and Preserve (AK)'s weather, including sunshine hours, humidity levels, and temperature data, visit our Glacier Bay National Park and Preserve (AK) Climate page.