Jakarta Weather in September
With daytime temperatures of 33°C (91°F) and nighttime lows of 25°C (77°F), September in Jakarta brings very high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 62 mm (2.4 in) falls on average.
Rainfall in Jakarta in September
On average, there are about 8 days with rain during this month, averaging 62 mm (2.4 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Jakarta in September
Expect highs of 33°C (91°F) in Jakarta in September, with nights dropping to around 25°C (77°F). For most visitors, the main thing to prepare for is the heat during the day. With lows around 25°C (77°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Jakarta in September
The month enjoys around 288 hours of sunshine, creating mostly sunny days with good weather conditions.
Wind Speed in Jakarta in September
September has wind speeds averaging 1 m/s (2 knots). You can expect very gentle conditions with light air movement on typical days. Since this is an average, daily weather varies from perfectly still moments to some breezier days.
Average water temperature in September
The water is 29°C (84°F) — very warm by most standards. Comfortable to swim in, but not particularly refreshing if you're looking to cool off.For Jakarta itself, June, July and August generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Indonesia, check out our Jakarta's climate page.
Jakarta Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
33°C (91°F)
Water Temperature
29°C (84°F)
Chance of Rain
27%
Precipitation
62 mm (2.4 in)
Rainy days
8 days
Humidity
71%
Windspeed
1 m/s (2 knots)
Sunshine
288 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Jakarta typically stay consistent throughout September, with daily highs averaging around 33°C (91°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Jakarta in September
Browse day-by-day weather records for Jakarta spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Jakarta historical weather extremes in September
Based on weather observations in Jakarta between 1991 and 2025, these are the recorded extremes during September.
- Jakarta recorded its highest September temperature of 37°C (99°F) on September 29, 2023.
- Jakarta experienced its chilliest September day on September 23, 2003, reaching only 25°C (77°F).
- Nighttime temperatures dropped to 20°C (68°F) on September 12, 2003, marking the coldest September night on record.
Best Places in Indonesia in September
Find out more about the weather in Indonesia and which places have the best travel conditions in this month. See all of Indonesia in September →
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What to Wear in Jakarta in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Rain is likely on several days, so bring a good rain jacket. The water temperature sits at about 29°C (84°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Jakarta in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Indonesia, check out our Jakarta's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Jakarta climate overview or explore weather in Indonesia.
