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

This page shows the average amount of rainfall per month in Kapaa (HI). The numbers are calculated over a 30-year period to provide a reliable average. Now, let’s break down all the details for a clearer picture.

On average, Kapaa receives a reasonable amount of rainfall, with an annual precipitation of 912 mm.

Monthly Precipitation Levels

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

Precipitation levels in Kapaa remain relatively steady throughout the year. March has the most rain, with 101 mm over 17 days. In September, this drops slightly to 65 mm, making the city's climate fairly predictable.

March, the city’s wettest month, has a maximum daytime temperature of 24°C. During the driest month September you can expect a temperature of 28°C. For more detailed insights into the city’s temperatures, visit our Kapaa 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

Kapaa’s average annual precipitation is 912 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.

In Shanghai, China, the annual average precipitation is 1347 mm, with a humid subtropical climate.

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.

How Does Precipitation Affect Local Climate?

Precipitation has a very strong role in determining the local climate and ecosystem:

• Rainy Seasons: Many parts of the world have well-defined wet seasons where precipitation is distinctly higher. These are normally accompanied by lush vegetation and temperature patterns.
• Dry Seasons: In areas where the climate is either desert or Mediterranean, the amount of precipitation is drastically reduced, leading to a shortage of water and arid conditions.

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