Indonesia Weather & Climate: Monthly Averages

In Indonesia, nearly all the major islands experience a tropical rainforest climate. Meanwhile, the smaller islands to the east of Java, as well as some parts of Java itself, experience a tropical monsoon climate. Daytime temperatures in most of Indonesia hover around 30°C (86°F) throughout the year. However, cooler temperatures can be found in elevated areas, particularly in Papua, where the highest peaks might even see perpetual snow.

Weather Conditions

Generally, visitors can expect tropical weather conditions, with bright sunshine intermingled with occasional heavy rain and thunderstorms. The monsoon season spans from September/October until the start of April, during which both the frequency and intensity of rainfall increase. By the end of the monsoon, humidity levels typically hover just above 80%, making the environment feel especially warm and sticky.

Come April, the dry season starts across most of Indonesia. However, during this drier phase, the northern regions may still encounter brief rainfall in June and July. August and September are notably drier, especially in the southern parts. By October, rainfall begins to increase again.

Best Time to Visit Indonesia

The best time to visit Indonesia is from June to September. This period is the driest and sunniest for most of the country, with somewhat cooler temperatures. Specifically, August and September are ideal for sun-seekers planning a trip. While July is also favorable, it tends to be slightly wetter. June is a good alternative for those looking to avoid the peak tourist season.