Borneo (Kalimantan) in september: average Weather, Temperature and Climate, Where to go?
Weather in Indonesian Borneo (Kalimantan) in september 2025
Below, check out the weather forecast for september for most popular cities in Kalimantan (Borneo). These forecasts are statistics for september from weather reports for many years. The percentage indicates the possibility of having the weather mentioned.
Average weather in september in Pontianak (Borneo)
tolerable weather UV index: 7
Weather at 6am
79°F
Partly Cloudy
34% of time
25%
23%
8%
Weather at 12pm
92°F
Partly Cloudy
33% of time
26%
24%
14%
Weather at 6pm
81°F
Moderate rain at times
36% of time
26%
24%
14%
Weather at 3am
77°F
31%
24%
18%
15%
More information about the weather in Pontianak (Borneo) in september
Where to go in Indonesian Borneo (Kalimantan) in september?
Where to go in Indonesian Borneo (Kalimantan) in september: destination map
perfect weather
good
tolerable
bad
very bad
Where to go in each region in september?
| Central Kalimantan (Palangkaraya, Tanjung Puting National Park, Pangkalan Bun...) | 94°F | 8 à 10 days | good weather | |
| East Kalimantan (Samarinda, Balikpapan, Derawan Islands...) | 86°F to 92°F | 9 à 19 days | 85°F | good weather* |
| North Kalimantan (Tarakan, Tanjung Selor, Sebatik...) | 88°F | 15 à 19 days | 86°F | tolerable weather |
| South Kalimantan (Banjarmasin, Banjarbaru, Martapura...) | 88°F to 92°F | 6 à 8 days | good weather | |
| West Kalimantan (Pontianak (Borneo), Danau Sentarum National Park, Gunung Palung National Park...) | 86°F to 94°F | 9 à 13 days | 85°F to 86°F | good weather* |
Where should you go in Indonesian Borneo (Kalimantan) in september when it comes to the weather?
Remember:
The climate in Indonesian Borneo (Kalimantan) in september ranges from good to tolerable depending on the region and city.
It is not perfect, however, the weather in Kalimantan (Borneo) that month should be good in Mempawah, Singkawang, Teluk Tamiang, Pemangkat, Kota Pagatan, Gunung Palung National Park and Lontar. I allows to enjoy vacation in these places. And even why not take a little time to sunbathe!
If you do not go to spend your time in a lounger by the pool, but, for example to discover the heritage, the cities of Batuampar, Betung Kerihun National Park, Banjarmasin, Bidukbiduk, Sesulu, Pelaihari, Palangkaraya, Muara Teweh, Puruk Cahu, Balikpapan, Putussibau, Barabai, Temajuk, Banjarbaru, Martapura, Bontang, Handil, Samarinda, Borneo (Pontianak), Pangkalan Bun, Tenggarong, Kutai National Park, Danau Sentarum National Park, Sebatik, Amuntai, Tanjung Puting National Park and Sampit have a decent enough weather for this kind of activity in september. Eventually, avoid going in the cities of Bunyu, Tarakan, Derawan Islands, Kakaban Island and Tanjung Selor in september because the climate is frankly unfavorable.
Climate in Indonesian Borneo (Kalimantan) in september
Climate in Pontianak (Borneo) in september
In the month of september, the mean temperature in Borneo (Pontianak) is 85°F (maximum temperature is 92°F and minimum temperature is 79°F). The climate is very hot in that locality in this month. With 8.2in over 12 days, you risk getting wet slightly for your vacations. But this is moderate and you will not be too bothered by it.
With a correct weather, the month of september is okay (but not good time) for traveling in that area.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 92°F | ||
| Lowest temperature | 79°F | ||
| Sea temperature | 85°F | ||
| Rainfall | 8.2in | ||
| Number of days with rainfall | 12 day(s) (41%) | ||
| Humidity | 88% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 40% | ||
| Length of day | 12:06 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Samarinda in september
In the month of september, the mean temperature in Samarinda is 88°F (maximum temperature is 92°F and minimum temperature is 83°F). The climate is very warm there in september. With 6.8in over 12 days, you will experience some showers throughout your stay. But this is reasonably and it will not be continuous.
With a correct climate, the month of september is okay (but not good time) for traveling in Samarinda.
| September | |||
| Average temperature | 88°F | ||
| Highest temperature | 92°F | ||
| Lowest temperature | 83°F | ||
| Rainfall | 6.8in | ||
| Number of days with rainfall | 12 day(s) (40%) | ||
| Humidity | 82% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 37% | ||
| Length of day | 12:07 | ||
| Our opinion at whereandwhen.net | good |
Climate in Balikpapan in september
In september, the mean temperature in Balikpapan is 85°F (maximum temperature is 86°F and minimum temperature is 81°F). The climate is very hot in this location in september. With 9.1in over 13 days, rain may occur for your journey. But this is pretty moderate and you will not be too bothered by it.
With a correct climate, the month of september is okay (but not the best time) for traveling in this locality in Indonesia.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 86°F | ||
| Lowest temperature | 81°F | ||
| Sea temperature | 84°F | ||
| Rainfall | 9.1in | ||
| Number of days with rainfall | 13 day(s) (44%) | ||
| Humidity | 82% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 36% | ||
| Length of day | 12:06 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Palangkaraya in september
In september, the mean temperature in Palangkaraya is 86°F (maximum temperature is 94°F and minimum temperature is 79°F). The climate is burning in this city in september. With 5.7in over 10 days, rainfall can happen throughout your journey. But this is rather reasonably and it will not be continuous.
With a correct climate, the month of september is okay (but not good month) for traveling there in Indonesia.
| September | |||
| Average temperature | 86°F | ||
| Highest temperature | 94°F | ||
| Lowest temperature | 79°F | ||
| Rainfall | 5.7in | ||
| Number of days with rainfall | 10 day(s) (32%) | ||
| Humidity | 84% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 42% | ||
| Length of day | 12:06 | ||
| Our opinion at whereandwhen.net | good |
Climate in Banjarbaru in september
In the month of september, the mean temperature in Banjarbaru is 85°F (maximum temperature is 90°F and minimum temperature is 79°F). The climate is very warm in this location in this month. With 4.6in over 7 days, rain may occur during your vacations. But this is rather reasonably and you will not be too bothered by it.
With proper weather, september is okay (but not the best time) for traveling there.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 90°F | ||
| Lowest temperature | 79°F | ||
| Rainfall | 4.6in | ||
| Number of days with rainfall | 7 day(s) (23%) | ||
| Humidity | 82% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 30% | ||
| Length of day | 12:05 | ||
| Our opinion at whereandwhen.net | good |
All cities in Indonesian Borneo (Kalimantan) in september
| Pontianak (Borneo) in september | tolerable weather |
| Samarinda in september | good weather |
| Balikpapan in september | tolerable weather |
| Palangkaraya in september | good weather |
| Banjarbaru in september | good weather |
| Banjarmasin in september | good weather |
| Barabai in september | good weather |
| Bidukbiduk in september | good weather |
| Bunyu in september | tolerable weather |
| Handil in september | good weather |
| Kakaban Island in september | tolerable weather |
| Derawan Islands in september | tolerable weather |
| Kota Pagatan in september | good weather |
| Martapura in september | good weather |
| Mempawah in september | good weather |
| Muara Teweh in september | good weather |
| Pangkalan Bun in september | good weather |
| Betung Kerihun National Park in september | good weather |
| Danau Sentarum National Park in september | good weather |
| Gunung Palung National Park in september | tolerable weather |
| Kutai National Park in september | good weather |
| Tanjung Puting National Park in september | good weather |
| Pemangkat in september | good weather |
| Puruk Cahu in september | good weather |
| Putussibau in september | good weather |
| Sebatik in september | tolerable weather |
| Sesulu in september | tolerable weather |
| Tanjung Selor in september | tolerable weather |
| Tarakan in september | tolerable weather |
| Teluk Tamiang in september | good weather |
| Temajuk in september | tolerable weather |
| Tenggarong in september | good weather |
| Amuntai in september | good weather |
| Batuampar in september | tolerable weather |
| Bontang in september | good weather |
| Lontar in september | good weather |
| Pelaihari in september | good weather |
| Sampit in september | good weather |
| Singkawang in september | good weather |
Weather data for Borneo (Kalimantan) in september:
Weather data for Borneo (Kalimantan) in september is derived from an average of the weather forecast since 2009 in Indonesian Borneo (Kalimantan). There is a margin of error and these forecasts are to be considered as general information only. The weather in Indonesian Borneo (Kalimantan) can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to Borneo (Indonesian Kalimantan).