Brunei Ap. Weather in September

September in Brunei Ap. typically sees daytime highs of 32°C (90°F) and nighttime lows of 25°C (77°F). September falls within the rainy season, so heavy rainfall is to be expected.

Rainfall in Brunei Ap. in September

Brunei Ap. is in the rainy season in September, with rain on around 21 days and an average of 215 mm (8.5 in). Rainy season showers tend to be fairly substantial. A good rain jacket or umbrella is worth having with you most days.

Temperature in Brunei Ap. in September

Temperatures in Brunei Ap. in September top out at 32°C (90°F) and drop to 25°C (77°F) overnight. If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. With lows around 25°C (77°F), the nights are warm enough that a sheet is usually all you need for bedding.

Sunshine in Brunei Ap. in September

With approximately 199 hours of sunshine, the days are filled with clear skies during the day. Rain typically falls in the afternoon or evening, keeping mornings and early parts of the day sunny.

Wind Speed in Brunei Ap. in September

Average wind conditions reach 1 m/s (2 knots) in September. This creates generally peaceful weather with subtle air movement. Remember this is an average: some days are windless while others have noticeable or very gentle breezes.

September in Brunei Ap. has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.

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For a detailed overview over the year and the best time to visit Brunei Darussalam, check out our Brunei Ap.'s climate page.

Brunei Ap. Temperature in September

Min Temperature 25°C (77°F)  

Max Temperature 32°C (90°F)  

Chance of Rain 69%  

Precipitation 215 mm (8.5 in)  

Rainy days 21 days  

Windspeed 1 m/s (2 knots)  

Sunshine 199 hours  

Percentage Sunshine  

Daily Historical Temperatures

48-year average (1978-2025)

Based on our historical records, temperatures in Brunei Ap. typically stay consistent throughout September, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 24°C (75°F).

Average temperatures in September

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Daily Historical Precipitation

48-year average (1978-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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

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Historical weather for Brunei Ap. in September

Browse day-by-day weather records for Brunei Ap. spanning 50 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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Brunei Ap. historical weather extremes in September

The extremes listed below come from historical weather data collected in Brunei Ap. from 1987 through 2025.

• Brunei Ap. recorded its highest September temperature of 36°C (97°F) on September 1, 2001.
• Brunei Ap. experienced its chilliest September day on September 15, 2021, reaching only 27°C (81°F).
• The coldest night in September in Brunei Ap. was on September 4, 2021, with a minimum of 22°C (72°F).

What to Wear in Brunei Ap. in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Brunei Ap. in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Brunei Darussalam, check out our Brunei Ap.'s climate page.

More climate data for Brunei Ap.

Temperature Rainfall Sunshine Wind Speed

See the full Brunei Ap. climate overview or explore weather in Brunei Darussalam.