Avarua Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Avarua. 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.

Avarua has a notably wet climate with abundant precipitation, recording 1685 mm of rainfall per year.

Monthly Precipitation Levels

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

Avarua can be quite wet during January, receiving approximately 225 mm of precipitation over 13 rainy days.

In contrast June, experiences much drier conditions, with 75 mm of rainfall, spread across 11 rainy days.

January, the wettest month, has a maximum daytime temperature of 28°C. The city receives 167 hours of sunshine in this period. During the driest month June you can expect a temperature of 26°C. For more detailed insights into the city’s temperatures, visit our Avarua Temperature page.

Annual Precipitation in the Cook Islands

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

Amsterdam Precipitation Compared World Wide

Avarua’s average annual precipitation is 1685 mm. Let’s compare this to some popular worldwide tourist destinations:

Seville, Spain, experiences 541 mm of rainfall annually, with wet winters and dry summers typical of southern Spain.

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

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

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 Avarua’s weather, including sunshine hours, humidity levels, and temperature data, visit our Avarua Climate page.