Weather in Indonesia in September

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27° C



42 mm

per month


30 %



79 %


What’s the weather like in Indonesia in September?

Indonesia experiences a tropical climate, with two main seasons – the dry season and the wet season. In September, the country is transitioning from the dry season to the wet season. This means that while some regions may still have relatively dry weather, others may start to experience occasional rainfall.

Average daily temperatures

In September, Indonesia generally has warm and humid temperatures throughout the country. However, the temperature can vary depending on the location and elevation. Coastal areas usually have higher temperatures, ranging from 25 to 31 degrees Celsius (77 to 88 degrees Fahrenheit), while higher altitude areas have more moderate temperatures, with averages around 20 to 25 degrees Celsius (68 to 77 degrees Fahrenheit).

It’s important to note that temperatures can also be influenced by factors such as winds and humidity, which can make it feel hotter or cooler than the actual temperature.

Sunshine and rainfall

September marks the transition into the wet season in Indonesia, which means that some regions may experience increased rainfall. The amount of rainfall can vary significantly between different areas of the country.

In coastal regions, including popular tourist destinations such as Bali, September typically sees increased rainfall compared to the dry season, with an average of around 80 to 120mm (3.1 to 4.7 inches) of rainfall for the month. Meanwhile, inland areas and regions closer to the equator may receive even higher amounts of rainfall.

Despite the increased rainfall, September still offers a fair share of sunshine. On average, Indonesia receives around 6 hours of sunshine per day in September. However, it’s important to keep in mind that the amount of sunshine can vary due to cloud cover and rainstorms, especially in areas experiencing more rainfall.

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