Jakarta Temperature by Month

Jakarta, Jakarta Province, Indonesia has a consistently very warm climate year-round, with daytime highs averaging 32°C (90°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.

With minimal seasonal shifts, Jakarta experiences a constant climate year-round. Maximum daytime temperatures range from a very warm 33°C (91°F) in September to a very warm 31°C (88°F) in January. At night, temperatures range from 25°C (77°F) in September to 24°C (75°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Jakarta by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. September, the city's warmest month, gets 288 hours of sunshine.

The chart below shows the average temperature throughout the year:

Jakarta's average annual maximum temperature is 32°C (90°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

Reykjavík, Iceland averages 9°C (48°F) a year, mild summers by Icelandic standards, but cold winters and frequent wind.

Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Jakarta, January is the coolest month, with average highs of 31°C (88°F) and humidity around 85%, considered very high. In September, the warmest month, temperatures average 33°C (91°F) with 71% humidity, conditions that feel high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Jakarta's weather, including monthly rainfall, sunshine hours, and humidity, visit our Jakarta climate page.