Climate of Brunei Darussalam

Last updated: April 14, 2025

Brunei Darussalam experiences a tropical rainforest climate characterized by high humidity, consistent temperatures, and significant rainfall throughout the year. Minimum temperatures drop to around 20°C (69°F) in February, while September can reach up to 37°C (98°F) in Temburong. Precipitation levels vary considerably, with February in the Brunei-Muara District receiving as little as 98 mm (3.8 in), escalating to a maximum of 301 mm (11.8 in) in December in Belait. Humidity remains high year-round, averaging a minimum of 80% in July in Tutong and peaking at 87% in March in the Brunei-Muara District, creating a lush and vibrant environment.

Brunei Darussalam Climate Zones

Brunei Darussalam boasts a tropical rainforest climate classified as Af under the Köppen-Geiger climate system, ensuring consistent warm temperatures and high humidity year-round. The climate is uniform across its regions, including the lush landscapes of Belait, the vibrant Brunei-Muara District, the scenic hills of Temburong, and the picturesque expanse of Tutong. This tropical paradise experiences abundant rainfall, contributing to its rich biodiversity and verdant surroundings, making it a haven for nature enthusiasts and eco-tourists alike.

Köppen-Geiger Climate Classification of Brunei Darussalam
Climate ZoneDescription
AfTropical rainforest climate with no dry season and high temperatures year-round.

Brunei Darussalam Temperature by Month

Brunei Darussalam experiences a tropical climate with consistently warm temperatures throughout the year. In January, the mercury starts at a mild 22°C (72°F) and peaks at 33°C (92°F), gradually warming through February to reach a maximum of 34°C (94°F). As the weeks progress into March and April, temperatures continue to rise, with highs reaching 35°C (95°F) in March and peaking at 36°C (96°F) by April. This warmth persists with minimal fluctuation, as May and July maintain maxima of 35°C (95°F) while keeping a steady minimum around 22°C (72°F). The summer months bring the highest temperatures, especially in September, where it can reach a blistering 37°C (98°F). Even as the year winds down, November and December cool slightly but remain comfortably warm, showcasing minimums around 22°C (72°F) and maxima between 33°C (92°F) and 34°C (93°F). Overall, Brunei's climate remains predictably pleasant yet occasionally sweltering, making it essential for visitors to stay cool and hydrated.

Monthly Temperatures in Brunei Darussalam

The chart illustrates Brunei Darussalam's temperature patterns throughout the year, with values aggregated from various locations across the region. It highlights seasonal variations and temperature changes across the months.
JanFebMarAprMayJunJulAugSepOctNovDec808080818282818281818180
Data source: Brunei Darussalam temperature data aggregated from multiple country locations, generated using Copernicus Climate Change Service information.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

Precipitation Patterns in Brunei Darussalam

Brunei Darussalam exhibits distinct precipitation patterns throughout the year, characterized by significant variation in both amount and frequency. February tends to be the driest month, with an average precipitation of just 98 mm (3.8 in) recorded in the Brunei-Muara District and only 18 rain days. In sharp contrast, December is the peak of the wet season, bringing an impressive 301 mm (11.8 in) of rain in Belait and almost daily rainfall, with 30 days of precipitation noted in Tutong. This trend highlights a clear seasonal fluctuation, marking December as the wettest and February as the driest month in this tropical region, offering a rhythm that shapes the local climate and environment.

Precipitation Trends in Brunei Darussalam

The chart illustrates Brunei Darussalam's yearly temperature patterns, showing data aggregated from various locations across the region, highlighting seasonal variations and monthly temperature changes.
JanFebMarAprMayJunJulAugSepOctNovDec221150172213215256204203257286290301
Data source: Brunei Darussalam precipitation data aggregated from multiple country locations, generated using Copernicus Climate Change Service information.
Choose your preferred precipitation unit

Brunei Darussalam Humidity

Brunei Darussalam experiences a consistently high level of humidity throughout the year, highlighting its tropical climate. Notably, the humidity reaches a minimum of 80% in July in Tutong, while it peaks at 87% in March in Brunei-Muara District. This trend illustrates a relatively stable humid environment, which can contribute to the region's lush vegetation and overall tropical allure. The slight variation in humidity levels suggests that visitors and residents alike should prepare for moisture-laden air year-round, enhancing the need for breathable clothing and hydration.

Average Humidity in Brunei Darussalam

Brunei Darussalam's Average Monthly Humidity Levels: This chart highlights Brunei Darussalam's humidity fluctuations throughout the year, making it easy to compare seasonal trends. See how humidity varies month by month and understand Brunei Darussalam's climate patterns.
JanFebMarAprMayJunJulAugSepOctNovDec86%87%87%84%80%81%80%82%85%81%81%84%
Data source: Humidity data for Brunei Darussalam generated using information from the Copernicus Climate Change Service.

Brunei Darussalam UV Index Trends

Brunei Darussalam experiences notably high ultraviolet (UV) index levels, particularly in March, where both the Belait and Brunei-Muara Districts showcase an average daily maximum UV index of 16. This consistent trend underscores the region's intense sun exposure during this month, emphasizing the importance of sun protection measures for residents and visitors alike. As climate patterns evolve, monitoring these UV index levels becomes essential for promoting awareness and safeguarding public health in Brunei Darussalam.

Maximum UV Index Levels in Brunei Darussalam

The chart shows the monthly maximum UV Index (UVI) in Brunei Darussalam, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec131516161413131414141312
Data source: Brunei Darussalam UV Index data aggregated from multiple regional locations, generated using Copernicus Climate Change Service information.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

Sunshine Duration in Brunei Darussalam

Brunei Darussalam enjoys a notable variation in sunshine duration throughout the year, with a marked increase during the warmer months. In January, the sun graces the skies for approximately 220 hours in Belait and 227 hours in Brunei-Muara District, offering a refreshing start to the year. However, as July arrives, sunshine peaks dramatically, boasting 296 hours in Belait and an impressive 300 hours in Brunei-Muara. This upward trend highlights the vibrant, sun-soaked climate that characterizes Brunei's mid-year months, inviting residents and visitors alike to bask in the tropical warmth.

Monthly Sunshine Duration in Brunei Darussalam

The Brunei Darussalam sunshine duration chart shows the total hours of direct sunlight in Brunei Darussalam each month, excluding cloudy or obstructed periods, and compares the sunshine duration across different months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec220h263h288h285h292h282h296h288h267h278h270h273h
Data source: Brunei Darussalam sunshine duration data aggregated from multiple country locations, generated using Copernicus Climate Change Service information.

Chance of Sun in Brunei Darussalam

In Brunei Darussalam, sunny weather can be somewhat elusive, particularly during certain months. For instance, December in Temburong sees a modest 4% likelihood of sunny days, suggesting a predominantly overcast climate during this time. However, as we transition into March, the scene brightens significantly in the Brunei-Muara District, where the chance of sunshine rises to 17%. This trend highlights a gradual move toward clearer skies as the year progresses, offering a glimmer of hope for sun enthusiasts eagerly awaiting the warmer months.

Percentage of Sunny Days in Brunei Darussalam

The chart illustrates the percentage of sunny days in Brunei Darussalam throughout the year. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Brunei Darussalam experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec5%16%14%16%12%12%15%9%8%8%6%5%
Data source: Brunei Darussalam chance of sun data, generated using information from the Copernicus Climate Change Service.

Average Daylight Hours Across the Brunei Darussalam

In Brunei Darussalam, daylight hours vary subtly throughout the year, offering a glimpse into the region's tropical climate. In December, residents in Tutong can expect about 11 hours of sunlight, creating a cozy atmosphere during the shorter days. By June, however, this shifts to a full 12 hours of daylight in the Brunei-Muara District, ensuring that the longer summer days bring vibrant energy to outdoor activities. This gradual increase in daylight showcases the country's consistent yet dynamic relationship with its equatorial positioning.

Average Monthly Daylight Hours in Brunei Darussalam

This chart shows the total daylight hours Brunei Darussalam receives each month, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 52m11h 57m12h 4m12h 12m12h 18m12h 21m12h 20m12h 14m12h 7m12h11h 53m11h 51m
Data source: Brunei Darussalam daylight hours, calculated by summing the hours between sunrise and sunset for each day.

Climate Breakdown by Brunei Darussalam Region

Nestled in Brunei Darussalam, Belait boasts a tropical climate characterized by warm temperatures and significant rainfall throughout the year. With temperatures averaging around 27°C (81°F), highs soar to 33°C (91°F) during the warmer months from May to September, while humidity consistently hovers above 80%, creating a lush, green landscape. The wettest months, October to December, see precipitation rising to over 290 mm (11.4 in), making it an ideal season for visitors to witness the region's vibrant flora. Exploring the lush surroundings becomes a delight, but don't forget to carry your umbrella! For a more detailed overview, check out the complete Belait climate.

In the Brunei-Muara District, the climate features a tropical humus that sees consistently warm temperatures throughout the year, with averages hovering around 27°C (81°F) and peak temperatures reaching up to 36°C (97°F) during the hottest months. High humidity, often exceeding 80%, contributes to the region's lush vegetation and vibrant ecosystems. Rainfall varies significantly, with the rainy season typically occurring from October to December, when monthly precipitation can surpass 280 mm (11 in). This rich climate not only influences daily life but also shapes Brunei's unique flora and fauna. For more detailed insights, explore the Brunei-Muara District climate.

Temburong, Brunei Darussalam, boasts a tropical climate characterized by consistently warm temperatures and high humidity year-round. Average temperatures hover around 27°C (81°F), while the mercury can peak at 37°C (98°F) during the hottest months. Rainfall is abundant, with October and November seeing the most precipitation, averaging over 270 mm (10.6 in). The lush rainforests thrive in this wet environment, making it a vibrant backdrop for exploring nature. For more details on the weather patterns, visit Temburong climate.

Nestled in Brunei Darussalam, Tutong experiences a tropical climate characterized by warm temperatures and significant rainfall throughout the year. Generally, the average temperature hovers around 27°C (80°F), with highs peaking at 33°C (91°F) during the hotter months of June through August, while nighttime lows typically don’t dip below 23°C (74°F). The region is known for its considerable precipitation, with November and December seeing nearly 300 mm of rainfall, making these the wettest months. Humidity levels remain high, averaging around 81%, which enhances the lush, vibrant surroundings. For a more detailed overview, check out the Tutong climate.

Summary and Key Takeaways on the Climate of the Brunei Darussalam

Brunei Darussalam experiences a tropical climate characterized by high temperatures and significant humidity throughout the year. The temperature typically fluctuates between a minimum of 20°C in February and peaks at a sweltering 37°C in September, particularly in Temburong. Coupled with this warmth is a notable amount of precipitation, where January and December bring some of the heaviest rains, with totals reaching up to 301 mm in Belait. This pattern of rainfall implies a marked wet season, especially from November to January, while humidity levels remain consistently high, averaging around 80-87% across the months, particularly in July and March, respectively, creating a lush and thriving ecosystem. As such, understanding these climatic trends is essential for appreciating the rich biodiversity and natural beauty of this vibrant nation.