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September Weather in Butterworth, Malaysia

Last updated: August 23, 2025

In September, the average temperature in Butterworth, Malaysia is a warm 28°C (82°F), with minimums dipping to 25°C (77°F) and maximums soaring to 31°C (89°F). However, be prepared for some rain, as the area receives an average of 285 mm (11.2 in) of precipitation over 24 days, accompanied by high humidity levels of 89%. Enjoy the tropical vibe, but don’t forget your umbrella!

September Temperature in Butterworth

In September in Butterworth, the average temperature is 28°C (82°F). Maximums can reach 31°C (89°F), while minimums can drop to as low as 25°C (77°F). This warm climate makes it a perfect destination for beach lovers and outdoor activities.

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

The chart illustrates September temperature patterns in Butterworth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Butterworth, September typically has an average temperature of 28°C (82°F), with highs reaching up to 31°C (89°F) and lows dropping to around 25°C (77°F).
JanFebMarAprMayJunJulAugSepOctNovDec828283828383838282828181
Data source: Temperature data for Butterworth generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Butterworth

In Butterworth in September, the precipitation amount is 285 mm (11.2 in) over the course of 24 days.

September Precipitation Trends in Butterworth

The chart displays monthly precipitation patterns in Butterworth, 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 Butterworth, September typically receives around 285 mm (11.2 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec9968136221299162142187285291347183
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Butterworth

In Butterworth in September humidity is 89%. With an average temperature of 28°C (82°F), this humidity feels like a thick, warm blanket enveloping you, making every step feel slightly heavier and the air dense, which can be quite stifling for traveling.

September Average Humidity in Butterworth

This chart illustrates the average monthly humidity levels in Butterworth, 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 Butterworth is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%76%74%73%79%85%84%87%89%87%88%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Butterworth

In Butterworth 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 Butterworth, you can check here.

Maximum UV Index Levels in Butterworth for September

The chart shows the monthly maximum UV Index (UVI) for Butterworth 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 Butterworth typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec131515141413121314141212
Data source: Butterworth 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 Butterworth Compares to Other Months

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

This table compares monthly weather conditions in Butterworth, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather28°C (82°F)99 mm (3.9 inches)83%extreme
February Weather28°C (82°F)68 mm (2.7 inches)76%extreme
March Weather28°C (83°F)136 mm (5.3 inches)74%extreme
April Weather28°C (83°F)221 mm (8.7 inches)73%extreme
May Weather28°C (83°F)299 mm (11.8 inches)79%extreme
June Weather28°C (83°F)162 mm (6.4 inches)85%extreme
July Weather28°C (83°F)142 mm (5.6 inches)84%extreme
August Weather28°C (83°F)187 mm (7.3 inches)87%extreme
September Weather28°C (82°F)285 mm (11.2 inches)89%extreme
October Weather28°C (82°F)291 mm (11.5 inches)86%extreme
November Weather27°C (81°F)346 mm (13.6 inches)88%extreme
December Weather27°C (82°F)183 mm (7.2 inches)90%extreme

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