September Weather in Sibu, Malaysia

Last updated: August 23, 2025

In September, the average temperature in Sibu, Malaysia reaches a pleasant 27°C (80°F). You can expect the temperature to range from a minimum of 22°C (71°F) to a maximum of 35°C (95°F). Be prepared for frequent showers, as the region receives an average precipitation of 293 mm (11.5 in) across 24 days. With an average humidity of 83%, it's a great time to enjoy the lush surroundings, but don’t forget to stay hydrated!

September Temperature in Sibu

In September in Sibu, the average temperature is 27°C (80°F). Maximums can reach 35°C (95°F), and minimums can be as low as 22°C (71°F). This makes it an ideal time for travelers seeking warm weather and pleasant conditions.

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

The chart illustrates September temperature patterns in Sibu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sibu, September typically has an average temperature of 27°C (80°F), with highs reaching up to 35°C (95°F) and lows dropping to around 22°C (71°F).

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

September Precipitation in Sibu

In Sibu in September, the precipitation amount is 293 mm (11.5 in) over the course of 24 days.

September Precipitation Trends in Sibu

The chart displays monthly precipitation patterns in Sibu, 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 Sibu, September typically receives around 293 mm (11.5 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 Sibu

In Sibu in September, humidity is 83%. With an average temperature of 27°C (80°F), this humidity feels like a warm, steamy embrace, making traveling a bit uncomfortable as the air clings to your skin and renders even the slightest exertion more exhausting.

September Average Humidity in Sibu

This chart illustrates the average monthly humidity levels in Sibu, 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 Sibu is approximately 83%, 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 Sibu

In Sibu in September, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Sibu.

Maximum UV Index Levels in Sibu for September

The chart shows the monthly maximum UV Index (UVI) for Sibu 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 Sibu typically reaches 15, which falls under the extreme exposure category.

Data source: Sibu 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 Sibu Compares to Other Months

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

This table compares monthly weather conditions in Sibu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	247 mm (9.7 inches)	86%	extreme
February Weather	26°C (80°F)	219 mm (8.6 inches)	87%	extreme
March Weather	27°C (80°F)	249 mm (9.8 inches)	88%	extreme
April Weather	27°C (81°F)	219 mm (8.6 inches)	83%	extreme
May Weather	27°C (82°F)	247 mm (9.7 inches)	80%	extreme
June Weather	27°C (81°F)	194 mm (7.6 inches)	80%	extreme
July Weather	27°C (81°F)	178 mm (7.0 inches)	80%	extreme
August Weather	27°C (81°F)	204 mm (8.0 inches)	82%	extreme
September Weather	27°C (80°F)	293 mm (11.5 inches)	83%	extreme
October Weather	27°C (80°F)	274 mm (10.8 inches)	81%	extreme
November Weather	27°C (80°F)	303 mm (11.9 inches)	80%	extreme
December Weather	26°C (80°F)	357 mm (14.0 inches)	83%	extreme