Kapolei (HI) Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Kapolei (HI). The numbers are calculated over a 30-year period to provide a reliable average. Let’s explore the details in depth to provide you with a complete overview.

Kapolei's climate is marked by below-average rainfall, accumulating 377 mm of precipitation yearly.

Monthly Precipitation Levels

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

The climate in Kapolei shows significant variation throughout the year. Expect 53 mm of precipitation during the wettest month December, distributed over 12 rainy days.

In contrast, July offers drier and sunnier days, with around 15 mm of rainfall over 10 rainy days.

December, the city’s wettest month, has a maximum daytime temperature of 26°C. During the driest month July you can expect a temperature of 28°C. For more detailed insights into the city’s temperatures, visit our Kapolei Temperature page.

Annual Precipitation in the United States of America

The map below shows the annual precipitation across the United States of America. You can also select the different months in case you are interested in a specific month.

Amsterdam Precipitation Compared World Wide

Kapolei’s average annual precipitation is 377 mm. Let’s compare this to some popular worldwide tourist destinations:

In Lisbon, Portugal, the average annual precipitation is 774 mm, characterized by wet winters and dry summers typical of the Mediterranean climate.

Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm of annual rainfall, mostly in the summer.

In Tokyo, Japan, the average annual precipitation is 1528 mm, with significant summer rains due to typhoon season.

Singapore, situated near the equator, gets 2581 mm of rainfall annually, with no distinct dry season and consistent monthly precipitation.

How is Precipitation Measured?

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.

Global Warming and Precipitation

Climate change is affecting precipitation patterns worldwide, including Kapolei (HI):

• 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.

For more detailed information about Kapolei (HI)’s weather, including sunshine hours, humidity levels, and temperature data, visit our Kapolei (HI) Climate page.