Waiheke Island Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Waiheke Island. The numbers are calculated over a 30-year period to provide a reliable average. Let's now guide you through the details for a complete overview.

Waiheke Island has a relatively rainy climate with high precipitation levels, averaging 1156 mm of rainfall annually.

Monthly Precipitation Levels

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

While rainfall varies throughout the year, each season offers its own charm. July brings wetter days averaging 123 mm of precipitation, spread over 17 rainy days.

In contrast, January experiences a drier climate, with about 71 mm of rainfall spread across 10 rainy days.

July, the wettest month, has a maximum daytime temperature of 15°C. The city receives 130 hours of sunshine in this period. During the driest month January you can expect a temperature of 22°C. For more detailed insights into the city’s temperatures, visit our Waiheke Island Temperature page.

Annual Precipitation in New Zealand

The map below shows the annual precipitation across New Zealand. You can also select the different months in case you are interested in a specific month.

Amsterdam Precipitation Compared World Wide

Waiheke Island’s average annual precipitation is 1156 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.

Melbourne, Australia, has 690 mm of rainfall annually, spread fairly evenly throughout the year.

Mumbai, India, experiences a tropical monsoon climate with 1860 mm of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.

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.

Interesting weather facts

• "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 wide and 20 cm 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 fell during the winter of 1972.

For more detailed information about Waiheke Island’s weather, including sunshine hours, humidity levels, and temperature data, visit our Waiheke Island Climate page.