Climate in Indonesia

Indonesia is located along the equator, north of Australia and just below the rest of south-east Asia. The weather is consistently warm to hot throughout Indonesia with lots of rainfall, which is the main variable in Indonesia’s climate. The almost uniformly warm waters that make up 81 percent of Indonesia's area ensure that temperatures on land remain constant. Split by the equator, the archipelago is almost entirely tropical in climate, with the coastal plains averaging 28°C, the inland and mountain areas averaging 26°C, and the higher mountain regions, 23°C.  

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The area's relative humidity ranges between 70 and 90 percent. Winds are moderate and generally predictable, with monsoons usually blowing in from the south and east in June through September and from the northwest in December through March. The extreme variations in rainfall are linked with the monsoons.  

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Located on the equator, the archipelago experiences relatively little change in the length of daylight hours from one season to the next; the difference between the longest day and the shortest day of the year is only forty-eight minutes. 

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