Indonesia weather in September
Indonesia in September averages 28°C (83°F), 60 mm of rain and 7.7 hours of sun a day.
Of the twelve months in Indonesia, September is the second driest and the third sunniest.
- Average temp
- 28°C (83°F)
25–32°C · 76–90°F
- Rainfall
- 60 mm
Showers likely
- Sunshine
- 7.7 h
hours per day
What is Indonesia like in September?
Daytime
Days are hot, often above 32°C.
Rain
Some rain is likely; pack for showers.
Evening
Evenings stay warm.
What should I pack for Indonesia in September?
High-factor sun cream
With daytime highs around 32°C, burn time is short even in shade.
Sunglasses and a brimmed hat
Midday glare is the part people underpack for, not the heat itself.
Loose cotton or linen
Synthetics stop working once you are sweating through them all day.
A refillable water bottle
Daily highs this warm need roughly double the water a temperate day does.
A light rain jacket
About 60 mm falls this month — showers rather than washouts.
September compared with August and October
September in Indonesia is about the same temperature as August and 14 mm wetter than it, which averages 28°C (82°F).
September in Indonesia is about the same temperature as October and 73 mm drier than it, which averages 29°C (84°F).
Daylight in Indonesia in September
On 15 September the sun is up for 12 hours 5 minutes in Indonesia, rising about 06:00 and setting about 18:05 local time.
Travel guides for Indonesia
What to read before you book.
Indonesia weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 28°C / 82°F | 238 mm |
| February | 28°C / 82°F | 118 mm |
| March | 28°C / 83°F | 97 mm |
| April | 28°C / 83°F | 133 mm |
| May | 28°C / 83°F | 123 mm |
| June | 28°C / 82°F | 103 mm |
| July | 28°C / 82°F | 70 mm |
| August | 28°C / 82°F | 46 mm |
| September | 28°C / 83°F | 60 mm |
| October | 29°C / 84°F | 133 mm |
| November | 29°C / 83°F | 154 mm |
| December | 28°C / 83°F | 212 mm |
Check another month
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FAQs about Indonesia in September
September climate averages for Indonesia, 1991–2020.
Indonesia averages 28°C (83°F) in September, ranging from about 25°C (76°F) at night to 32°C (90°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 60 mm falls across September, enough to need a light jacket but not enough to reshape a trip.
They are about the same. September averages 28°C (83°F) and October 29°C (84°F), so temperature alone will not decide between them.
September is about as warm as August, and 14 mm wetter.
Yes. September falls inside the most comfortable stretch of the year here, June to September, on temperature and rainfall together.
About 7.7 hours of sun a day on the 1991–2020 average.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 5 minutes of daylight in mid-September, against 12 hours 16 minutes in December and 11 hours 59 minutes in June.
On 15 September, sunrise is about 06:00 and sunset about 18:05 local time. Both shift across the month.
