September Weather in Seria, Brunei Darussalam

Last updated: August 22, 2025

In September, the average temperature in Seria, Brunei Darussalam hovers around 27°C (81°F). Expect to experience a comfortable minimum of 24°C (75°F) and a warm maximum of 33°C (91°F). With an average humidity of 85%, conditions can feel quite muggy. Additionally, be prepared for some rain, as precipitation amounts reach 257 mm (10.1 in) over 24 days.

September Temperature in Seria

In September in Seria, the average temperature is 27°C (81°F), with maximums reaching 33°C (91°F) and minimums dropping as low as 24°C (75°F). This pleasant weather makes it an ideal time for traveling and exploring the local attractions.

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

The chart illustrates September temperature patterns in Seria, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seria, September typically has an average temperature of 27°C (81°F), with highs reaching up to 33°C (91°F) and lows dropping to around 24°C (75°F).

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

September Precipitation in Seria

In Seria in September, the precipitation amount is 257 mm (10.1 in) over the course of 24 days.

September Precipitation Trends in Seria

The chart displays monthly precipitation patterns in Seria, 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 Seria, September typically receives around 257 mm (10.1 inches) of precipitation spread over approximately 24 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 Seria

In Seria in September humidity is 85%. With an average temperature of 27°C (81°F), this humidity feels like a thick blanket enveloping you, making every step feel heavier as sweat clings to your skin and the air feels almost tangible, which can be quite challenging for traveling.

September Average Humidity in Seria

This chart illustrates the average monthly humidity levels in Seria, 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 Seria 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 Seria

In Seria 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 Seria, you can check here.

Maximum UV Index Levels in Seria for September

The chart shows the monthly maximum UV Index (UVI) for Seria 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 Seria typically reaches 14, which falls under the extreme exposure category.

Data source: Seria 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 Seria Compares to Other Months

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

This table compares monthly weather conditions in Seria, 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 (80°F)	221 mm (8.7 inches)	86%	extreme
February Weather	27°C (80°F)	150 mm (5.9 inches)	87%	extreme
March Weather	27°C (81°F)	172 mm (6.8 inches)	87%	extreme
April Weather	27°C (81°F)	213 mm (8.4 inches)	84%	extreme
May Weather	28°C (82°F)	215 mm (8.5 inches)	80%	extreme
June Weather	28°C (82°F)	256 mm (10.1 inches)	81%	extreme
July Weather	27°C (82°F)	204 mm (8.0 inches)	80%	extreme
August Weather	28°C (82°F)	203 mm (8.0 inches)	82%	extreme
September Weather	27°C (81°F)	257 mm (10.1 inches)	85%	extreme
October Weather	27°C (81°F)	286 mm (11.3 inches)	81%	extreme
November Weather	27°C (81°F)	290 mm (11.4 inches)	81%	extreme
December Weather	27°C (80°F)	301 mm (11.8 inches)	84%	extreme