Riau Archipelago Weather in September

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

Planning a journey to the Riau Archipelago, 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 the Riau Archipelago in September

The Riau Archipelago, Indonesia is a region in Indonesia. September in the Riau Archipelago generally has warm temperatures, with precipitation levels ranging from high to heavy.

Temperatures

You can expect warm maximum daytime temperatures of around 30°C (86°F) and nighttime temperatures around 27°C (81°F) in Nagoya. The temperatures cited for both day and night represent usual averages, but it's possible some days could be hotter. It's advisable to dress accordingly to handle the heat.

For specific regional insights in the Riau Archipelago, Indonesia, refer to the map provided below.

Precipitation

In September, precipitation varies across different areas. From high rainfall in Teluk Bakau with an average of 146 mm (5.7 in) to heavy rainfall in Tanjung Balai Karimun with 176 mm (6.9 in).

Average sunshine

Sunshine is fairly consistent across many areas. Nagoya receives about 156 hours of sunlight in September, providing a good balance between sunny spells and cloud cover. If you're after more sunshine hours, take a look at our weather planner for other sun-rich destinations worldwide.

Explore the Riau Archipelago by month

Best Places to Visit in the Riau Archipelago in September

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

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 the Riau Archipelago

What is the weather like in September for some of the most popular destinations in the Riau Archipelago, Indonesia?

Temperature range in the Riau Archipelago (September)

Precipitation variation in the Riau Archipelago (September)

Nagoya

In September Nagoya generally has high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 27°C (81°F) and heavy monthly rainfall. So on average the conditions are tolerable that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
27°C (81°F)
27°C (81°F)
26°C (79°F)
Monthly sun hours
181 hours
156 hours
155 hours
Monthly rainfall
172 mm (6.8 in)
162 mm (6.4 in)
211 mm (8.3 in)
Monthly rainy days
13 days
14 days
16 days
Weather conditions

Batam Center

In September Batam Center generally has high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 27°C (81°F) and heavy monthly rainfall. So on average the conditions are tolerable that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
27°C (81°F)
27°C (81°F)
26°C (79°F)
Monthly sun hours
181 hours
156 hours
155 hours
Monthly rainfall
172 mm (6.8 in)
162 mm (6.4 in)
212 mm (8.3 in)
Monthly rainy days
13 days
14 days
16 days
Weather conditions

Lagoi

In September Lagoi generally has high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 27°C (81°F) and high monthly rainfall. So on average the conditions are tolerable that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
27°C (81°F)
27°C (81°F)
26°C (79°F)
Monthly sun hours
181 hours
156 hours
155 hours
Monthly rainfall
157 mm (6.2 in)
155 mm (6.1 in)
210 mm (8.3 in)
Monthly rainy days
14 days
15 days
16 days
Weather conditions

Tanjung Pinang

In September Tanjung Pinang generally has high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 27°C (81°F) and high monthly rainfall. So on average the conditions are tolerable that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
27°C (81°F)
27°C (81°F)
26°C (79°F)
Monthly sun hours
181 hours
156 hours
155 hours
Monthly rainfall
152 mm (6 in)
152 mm (6 in)
214 mm (8.4 in)
Monthly rainy days
13 days
14 days
16 days
Weather conditions

Tanjung Balai Karimun

In September Tanjung Balai Karimun generally has high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 26°C (79°F) and heavy monthly rainfall. So on average the conditions are tolerable that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
27°C (81°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
181 hours
156 hours
155 hours
Monthly rainfall
179 mm (7 in)
176 mm (6.9 in)
229 mm (9 in)
Monthly rainy days
14 days
15 days
17 days
Weather conditions

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

Popular cities in September

Day & night temperatures, rainfall and average weather in the Riau Archipelago in September.

City Weather Day temp Night temp Rainfall
Nagoya 30°C (86°F) 27°C (81°F) 162 mm (6.4 in)
Batam Center 30°C (86°F) 27°C (81°F) 162 mm (6.4 in)
Lagoi 30°C (86°F) 27°C (81°F) 155 mm (6.1 in)
Tanjung Pinang 30°C (86°F) 27°C (81°F) 152 mm (6 in)
Tanjung Balai Karimun 30°C (86°F) 26°C (79°F) 176 mm (6.9 in)
Sekupang 30°C (86°F) 27°C (81°F) 166 mm (6.5 in)

The Riau Archipelago weather in September: frequently asked questions

What is the weather like in the Riau Archipelago, Indonesia in September?

September in the Riau Archipelago, Indonesia brings unpleasant weather. In Nagoya, daytime temperatures are typically around 30°C (86°F) and nighttime lows hover near 27°C (81°F).

What is the average temperature in the Riau Archipelago, Indonesia in September?

In Nagoya, the average daytime high in September is 30°C (86°F), while nighttime temperatures drop to around 27°C (81°F).

Does the Riau Archipelago, Indonesia get a lot of rain in September?

Yes. September brings heavy rainfall to the Riau Archipelago, Indonesia, with Nagoya averaging around 162 mm (6.4 in). Expect frequent showers and pack accordingly.

Is September a Good Time to Visit the Riau Archipelago, Indonesia?

Given the typically tolerable weather conditions in Nagoya, September might be a good time to visit the Riau Archipelago, Indonesia. However, the weather conditions may vary depending on your destination.

On average, the best time to visit the Riau Archipelago, Indonesia is in February and March with generally pleasant weather in Nagoya. In contrast, April, May, June, July, October, November and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in the Riau Archipelago.

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.

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