September Weather in Mentiri, Brunei Darussalam

Last updated: August 22, 2025

In September, the average temperature in Mentiri, Brunei Darussalam hovers around 28°C (83°F). Visitors can expect a comfortable range, with a minimum of 23°C (74°F) and a maximum reaching up to 35°C (96°F). However, the region is quite humid, boasting an average humidity of 85%. Rainfall is noteworthy as well, with an average precipitation of 213 mm (8.4 in) spread across 22 days throughout the month.

September Temperature in Mentiri

In September in Mentiri, the average temperature is 28°C (83°F). Maximum temperatures can reach 35°C (96°F), while the minimum can dip down to 23°C (74°F). This pleasant climate makes it an ideal time for outdoor activities and exploration.

September Weather in Mentiri: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Mentiri, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mentiri, September typically has an average temperature of 28°C (83°F), with highs reaching up to 35°C (96°F) and lows dropping to around 23°C (74°F).

Data source: Temperature data for Mentiri generated using information from the Copernicus Climate Change Service.

September Precipitation in Mentiri

In Mentiri in September, the total precipitation amount reaches 213 mm (8.4 in) over the course of 22 days.

September Precipitation Trends in Mentiri

The chart displays monthly precipitation patterns in Mentiri, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Mentiri, September typically receives around 213 mm (8.4 inches) of precipitation spread over approximately 22 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Mentiri

In Mentiri in September humidity is 85%. With an average temperature of 28°C (83°F), this humidity feels like an enveloping blanket, making traveling quite sticky and exhausting, as the air thickens and makes every movement feel laborious.

September Average Humidity in Mentiri

This chart illustrates the average monthly humidity levels in Mentiri, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Mentiri is approximately 85%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mentiri

In Mentiri in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Mentiri, you can check here.

Maximum UV Index Levels in Mentiri for September

The chart shows the monthly maximum UV Index (UVI) for Mentiri in September, 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. In September, the maximum UV index in Mentiri typically reaches 14, which falls under the extreme exposure category.

Data source: Mentiri September UVI data generated using information from the Copernicus Climate Change Service.

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.

How September Weather in Mentiri Compares to Other Months

Weather in Mentiri varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Mentiri, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Mentiri, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (81°F)	176 mm (6.9 inches)	86%	extreme
February Weather	27°C (81°F)	98 mm (3.8 inches)	87%	extreme
March Weather	27°C (82°F)	114 mm (4.5 inches)	87%	extreme
April Weather	28°C (83°F)	158 mm (6.2 inches)	84%	extreme
May Weather	28°C (83°F)	157 mm (6.2 inches)	80%	extreme
June Weather	28°C (83°F)	223 mm (8.8 inches)	81%	extreme
July Weather	28°C (83°F)	187 mm (7.4 inches)	80%	extreme
August Weather	28°C (83°F)	189 mm (7.4 inches)	82%	extreme
September Weather	28°C (83°F)	213 mm (8.4 inches)	85%	extreme
October Weather	28°C (82°F)	283 mm (11.1 inches)	81%	extreme
November Weather	27°C (82°F)	273 mm (10.8 inches)	81%	extreme
December Weather	27°C (81°F)	288 mm (11.3 inches)	84%	extreme