Biak Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Biak, Papua, Indonesia. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Now, let's break down all the details for a clearer picture.
Biak is known for its substantial rainfall, with annual precipitation reaching 2814 mm (111 in).
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Despite minor fluctuations, Biak enjoys fairly consistent precipitation throughout the year. In June, you can expect around 285 mm (11 in) of precipitation, while in October, Biak receives about 195 mm (7.7 in).
June, the wettest month, has a maximum daytime temperature of 29°C (84°F). The city receives 108 hours of sunshine in this period. During the driest month October you can expect a temperature of 30°C (86°F). For more detailed insights into the city's temperatures, visit our Biak Temperature page.
Annual Rainfall in Indonesia: City Comparison
The map below shows the annual precipitation across Indonesia. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Biak vs World: Rainfall Compared
Biak's average annual precipitation is 2814 mm (111 in). Let's compare this to some popular worldwide tourist destinations:
Seville, Spain, experiences 541 mm (21 in) of rainfall annually, with wet winters and dry summers typical of southern Spain.
In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.
In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.
Mumbai, India, experiences a tropical monsoon climate with 1860 mm (73 in) of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.
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 Biak:
- 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.
- Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
- In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) per year, with some years recording virtually no rainfall.
- Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.
For more detailed information about Biak's weather, including sunshine hours, humidity levels, and temperature data, visit our Biak Climate page.
