Nusantara climate
Nusantara (Indonesia) has a tropical rainforest climate (Köppen Af). The average temperature over the year is 26 °C79 °F, and about 2,429 mm96 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Nusantara climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2883 | 2475 | 2679 | 2238.8 |
| Feb | 2883 | 2474 | 2679 | 2048.1 |
| Mar | 2983 | 2475 | 2679 | 2379.3 |
| Apr | 2984 | 2476 | 2680 | 2329.1 |
| May | 2983 | 2576 | 2780 | 2248.8 |
| Jun | 2882 | 2475 | 2679 | 2198.6 |
| Jul | 2882 | 2474 | 2678 | 1837.2 |
| Aug | 2882 | 2374 | 2678 | 1285.1 |
| Sep | 2883 | 2474 | 2679 | 1405.5 |
| Oct | 2984 | 2475 | 2679 | 1616.3 |
| Nov | 2984 | 2475 | 2680 | 2208.6 |
| Dec | 2883 | 2475 | 2679 | 25810 |
| Year | 2984 | 2374 | 2679 | 2,42996 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 89% | 89% | 4.6 | 12:10 |
| Feb | 89% | 83% | 5.0 | 12:09 |
| Mar | 89% | 80% | 4.9 | 12:07 |
| Apr | 88% | 79% | 4.8 | 12:05 |
| May | 89% | 73% | 4.6 | 12:04 |
| Jun | 90% | 72% | 4.4 | 12:04 |
| Jul | 90% | 69% | 4.5 | 12:04 |
| Aug | 88% | 65% | 4.7 | 12:05 |
| Sep | 88% | 68% | 4.8 | 12:06 |
| Oct | 88% | 77% | 4.6 | 12:08 |
| Nov | 87% | 83% | 4.6 | 12:10 |
| Dec | 88% | 89% | 4.6 | 12:11 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Nusantara is like
The warmest month is May, with an average high of 29 °C83 °F and a low of 25 °C76 °F. The coldest is July, when highs average 28 °C82 °F and lows 24 °C74 °F. Temperatures barely change through the year: the warmest and the coolest month differ by only 0.9 °C1.7 °F.
It is very wet, receiving about 2,429 mm96 in of precipitation per year. The wettest three-month stretch is November–January, which brings 29% of the annual total. The wettest month is December (258 mm10 in), the driest is August (128 mm5.1 in).
Relative humidity ranges from 87% in November to 90% in June. The clearest skies (lowest average cloud amount, 65%) are typical of August. Average wind speed near the ground ranges from 2 km/h (1 mph) in April to 2 km/h (1 mph) in August.
Best time to visit Nusantara
No month comes close to our comfort ideal here. The least demanding months are August, September and October (average highs 28 °C82 °F, 28 °C83 °F and 29 °C84 °F).
The most challenging month is December, which is very wet (258 mm10 in) and humid (88% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Nusantara
- Wetter months (November–June) — highs 2882 to 29 °C84 °F, lows 2474 to 25 °C76 °F, about 227 mm8.9 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
- Drier months (July–October) — highs 2882 to 29 °C84 °F, lows 2374 to 24 °C75 °F, about 153 mm6.0 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
How Nusantara compares
Compared with Balikpapan, about 35 km to the south, Nusantara is on average 0.9 °C1.7 °F cooler and receives a similar amount of precipitation. The difference is largest in July (1.1 °C1.9 °F cooler).
Of the 110 places in Indonesia covered by World Climates, Nusantara is the 88th warmest by annual mean temperature and the 42nd wettest by annual precipitation. See all of them on the Indonesia climate page.
Places in other countries with the most similar temperature and rainfall pattern (seasons shifted for the other hemisphere where needed): Leticia (Colombia, Af), NIA Valencia (Philippines, Af) and Lahad Datu (Malaysia, Af).
Nearby places
- Balikpapan 35 km · 27 °C81 °F · 2,469 mm97 in
- Samarinda 72 km · 26 °C78 °F · 2,449 mm96 in
- Bontang 150 km · 27 °C81 °F · 2,192 mm86 in
- Palangkaraya 339 km · 26 °C79 °F · 2,850 mm112 in
- Banjarbaru 344 km · 27 °C80 °F · 2,632 mm104 in
- Banjarmasin 351 km · 28 °C82 °F · 2,785 mm110 in
- Palu 352 km · 27 °C81 °F · 1,734 mm68 in
- Palopo 448 km · 27 °C81 °F · 3,184 mm125 in
Frequently asked questions
What is the warmest month in Nusantara?
May is the warmest month in Nusantara, with an average high of 29 °C (83 °F) and an average low of 25 °C (76 °F).
What is the coldest month in Nusantara?
July is the coldest month, with an average high of 28 °C (82 °F) and an average low of 24 °C (74 °F).
When does it rain the most in Nusantara?
December is the wettest month with about 258 mm (10.1 in) of precipitation; August is the driest with about 128 mm (5.1 in).
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.