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Kuala Belait Weather in September
September in Kuala Belait sees daytime temperatures around 31°C (88°F) and lows of 26°C (79°F) at night. Being part of the rainy season, heavy rainfall is a regular part of the day, so pack accordingly.
Rainfall in Kuala Belait in September
Kuala Belait is in the rainy season in September, with rain on around 21 days and an average of 215 mm (8.5 in). The rainy season here brings regular, substantial showers. It's worth being prepared for rain on most days you're out.
Temperature in Kuala Belait in September
If you're visiting Kuala Belait in September, expect highs of 31°C (88°F) and overnight lows around 26°C (79°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. At 26°C (79°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Kuala Belait in September
The area experiences a moderate amount of sunshine, with approximately 185 hours of sunlight expected. Even though this month is part of the rainy season, you could still see the sun every now and then.Our weather planner can help you find worldwide destinations with pleasant weather during this period. February typically offers the best weather for Kuala Belait.
Kuala Belait Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
31°C (88°F)
Chance of Rain
70%
Precipitation
215 mm (8.5 in)
Rainy days
21 days
Sunshine
185 hours *
Percentage Sunshine
*
* Data from: Miri, Malaysia (32 KM, 20 Miles).
Kuala Belait Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Kuala Belait - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Kuala Belait typically stay consistent throughout September, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Kuala Belait in September
Browse day-by-day weather records for Kuala Belait spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Kuala Belait historical weather extremes in September
Based on weather observations in Kuala Belait between 1991 and 2025, these are the recorded extremes during September.
- Kuala Belait recorded its highest September temperature of 35°C (95°F) on September 16, 2023.
- On September 15, 2021, Kuala Belait saw its coldest September day with temperatures maxing out at 25°C (77°F).
- Nighttime temperatures dropped to 21°C (70°F) on September 9, 2019, marking the coldest September night on record.
- The wettest day in September Kuala Belait was on September 7, 2008 with 147 mm (5.8 in) of precipitation.
Best Places in Brunei Darussalam in September
Find out more about the weather in Brunei Darussalam and which places have the best travel conditions in this month. See all of Brunei Darussalam in September →
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).
What to Wear in Kuala Belait in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. Sunglasses could come in handy during the sunnier parts of your trip.
What To Do in Kuala Belait in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Kuala Belait 3-Day Forecast
More climate data for Kuala Belait
See the full Kuala Belait climate overview or explore weather in Brunei Darussalam.
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Where to go in September - average daytime high across popular destinations.
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