Bontang climate
Bontang (Indonesia) has a tropical rainforest climate (Köppen Af). The average temperature over the year is 27 °C81 °F, and about 2,192 mm86 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Bontang climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2883 | 2577 | 2780 | 2198.6 |
| Feb | 2883 | 2577 | 2780 | 1606.3 |
| Mar | 2983 | 2578 | 2781 | 2108.3 |
| Apr | 2984 | 2678 | 2781 | 2188.6 |
| May | 2984 | 2679 | 2781 | 2078.1 |
| Jun | 2883 | 2678 | 2781 | 1847.2 |
| Jul | 2883 | 2577 | 2780 | 1556.1 |
| Aug | 2883 | 2577 | 2780 | 1144.5 |
| Sep | 2984 | 2577 | 2781 | 1375.4 |
| Oct | 2984 | 2678 | 2781 | 1566.2 |
| Nov | 2984 | 2678 | 2781 | 1977.8 |
| Dec | 2983 | 2578 | 2781 | 2359.2 |
| Year | 2984 | 2577 | 2781 | 2,19286 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 86% | 88% | 4.7 | 12:07 |
| Feb | 85% | 81% | 5.2 | 12:07 |
| Mar | 85% | 78% | 5.3 | 12:07 |
| Apr | 85% | 77% | 5.3 | 12:07 |
| May | 85% | 74% | 5.0 | 12:07 |
| Jun | 85% | 78% | 4.6 | 12:08 |
| Jul | 85% | 74% | 4.7 | 12:08 |
| Aug | 84% | 70% | 5.0 | 12:07 |
| Sep | 83% | 72% | 5.1 | 12:07 |
| Oct | 83% | 77% | 5.0 | 12:07 |
| Nov | 84% | 82% | 4.9 | 12:07 |
| Dec | 85% | 87% | 4.7 | 12:07 |
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 Bontang is like
The warmest month is May, with an average high of 29 °C84 °F and a low of 26 °C79 °F. The coldest is July, when highs average 28 °C83 °F and lows 25 °C77 °F. Temperatures barely change through the year: the warmest and the coolest month differ by only 0.8 °C1.5 °F.
It is very wet, receiving about 2,192 mm86 in of precipitation per year. The wettest three-month stretch is November–January, which brings 30% of the annual total. The wettest month is December (235 mm9.2 in), the driest is August (114 mm4.5 in).
Relative humidity ranges from 83% in October to 86% in January. The clearest skies (lowest average cloud amount, 70%) are typical of August. Average wind speed near the ground ranges from 5 km/h (3 mph) in April to 7 km/h (5 mph) in August.
Best time to visit Bontang
Based on these averages, the most comfortable months for sightseeing and outdoor activities are August: average highs of 28 °C83 °F to 28 °C83 °F with 114 mm4.5 in to 114 mm4.5 in of precipitation per month.
The most challenging month is December, which is very wet (235 mm9.2 in) and humid (85% 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 Bontang
- Wetter months (November–January, March–June) — highs 2883 to 29 °C84 °F, lows 2577 to 26 °C79 °F, about 210 mm8.3 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 (February, July–October) — highs 2883 to 29 °C84 °F, lows 2577 to 26 °C78 °F, about 144 mm5.7 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 Bontang compares
Compared with Samarinda, about 79 km to the southwest, Bontang is on average 1.2 °C2.1 °F warmer and receives 11% less precipitation (2,192 mm86 in vs 2,449 mm96 in). The difference is largest in June (1.3 °C2.3 °F warmer).
Of the 110 places in Indonesia covered by World Climates, Bontang is the 58th warmest by annual mean temperature and the 64th 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: Singapore (Singapore, Af), Seremban (Malaysia, Af) and Kajang (Malaysia, Af).
Nearby places
- Samarinda 79 km · 26 °C78 °F · 2,449 mm96 in
- Nusantara 150 km · 26 °C79 °F · 2,429 mm96 in
- Balikpapan 172 km · 27 °C81 °F · 2,469 mm97 in
- Palu 289 km · 27 °C81 °F · 1,734 mm68 in
- Tarakan 354 km · 28 °C82 °F · 2,897 mm114 in
- Toli-Toli 384 km · 25 °C78 °F · 2,008 mm79 in
- Tawau 459 km · 28 °C82 °F · 2,490 mm98 in
- Palopo 460 km · 27 °C81 °F · 3,184 mm125 in
Frequently asked questions
What is the warmest month in Bontang?
May is the warmest month in Bontang, with an average high of 29 °C (84 °F) and an average low of 26 °C (79 °F).
What is the coldest month in Bontang?
July is the coldest month, with an average high of 28 °C (83 °F) and an average low of 25 °C (77 °F).
When does it rain the most in Bontang?
December is the wettest month with about 235 mm (9.2 in) of precipitation; August is the driest with about 114 mm (4.5 in).
What is the best time to visit Bontang?
Judging by long-term averages, the most comfortable months are August.
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.