Borneo Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Borneo, Indonesia in September.

🔎
Samarinda

Planning a journey to Borneo, Indonesia this September and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What to Expect in Borneo in September

Borneo, Indonesia is a region in Indonesia. September in Borneo generally has very warm temperatures, with heavy precipitation.

Temperatures

You can expect very warm maximum daytime temperatures of around 33°C (91°F) and nighttime temperatures around 24°C (75°F) in Samarinda. The temperatures mentioned for daytime and nighttime are general averages. However there can be days that surpass these temperatures. So equip yourself with clothing that can handle the potential heat.

To learn more about the conditions in specific areas of Borneo, Indonesia, check out the map below.

Precipitation

September is a very rainy month with an average rainfall of around 185 mm (7.3 in) in Samarinda.

Explore Borneo by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Best Places to Visit in Borneo in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Borneo.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Borneo

What is the weather like in September for the most popular destinonation in Borneo, Indonesia?

Samarinda

In September Samarinda generally has very high temperatures with maximum daytime temperatures around 33°C (91°F), minimum nighttime temperatures around 24°C (75°F) and heavy monthly rainfall. So on average the conditions are unpleasant that month.

« August
September
October »
August
September
October
Max temperature
32°C (90°F)
33°C (91°F)
33°C (91°F)
Min temperature
24°C (75°F)
24°C (75°F)
24°C (75°F)
Monthly rainfall
168 mm (6.6 in)
185 mm (7.3 in)
237 mm (9.3 in)
Monthly rainy days
12 days
10 days
11 days
Weather conditions
tolerable
unpleasant
poor
Climate in Samarinda →

Is your destination not in the list? Have a look at all destinations in Borneo, in Indonesia.

In our records: Indonesia September extremes

Notable September records observed across cities in Indonesia in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • In our records, the coldest September daytime high in Indonesia was 18°C (64°F) in Bandung on September 23, 2003.

Borneo weather in September: frequently asked questions

What is the weather like in Borneo, Indonesia in September?

September in Borneo, Indonesia brings poor weather. In Samarinda, daytime temperatures are typically around 33°C (91°F) and nighttime lows hover near 24°C (75°F).

What is the average temperature in Borneo, Indonesia in September?

Daytime temperatures in Samarinda peak at roughly 33°C (91°F) in September, dropping to about 24°C (75°F) overnight.

Does Borneo, Indonesia get a lot of rain in September?

Expect plenty of rainfall. Samarinda records an average of 185 mm (7.3 in) in September, putting it among the wetter months for Borneo, Indonesia.

Is September a Good Time to Visit Borneo, Indonesia?

In our opinion, September may not be the ideal time to visit Borneo, Indonesia due to the typically unpleasant weather in Samarinda.

On average, the best time to visit Borneo, Indonesia is in August with generally unpleasant weather in Samarinda.

Interested in more climate information?

We have much more information about the climate in Borneo.

Weather and climate has detailed information for every country in the world. Are you going to Indonesia? Get detailed historical weather averages for many cities in Indonesia.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.

10 Hidden gems in Asia you need to visit

Explore 10 hidden gems in Asia offering authentic experiences, from pristine beaches and remote islands to cultural treks and peaceful mountain villages.
The ultimate guide to Ubud – everything you need to know to escape the crowds

There is a way to experience Ubud in a fantastic less crowded way and this article will be your guide how to do that. Find the best places to stay, where to eat and much more.
Top 5 hidden gem islands in Indonesia

Discover Indonesia's secret islands: pristine beaches, rich history, and vibrant culture await beyond Bali and Java. Dive into untouched paradise.
Six Organic Farms & Farmstays in Indonesia

We've compiled a list of organic farms in Indonesia that have a positive impact on their communities - they could use your help during this pandemic.
Must visit in Indonesia →