September Weather in Penang, Indonesia

Last updated: August 23, 2025

In Penang, Indonesia, the average temperature in September hovers around 26°C (78°F), offering a pleasant climate for outdoor activities. Expect a minimum temperature of 17°C (63°F) and a maximum of 33°C (91°F), perfect for those who enjoy warmth. The area sees a precipitation amount of about 11 mm (0.4 in) over the course of 3 days, and with an average humidity of 70%, it creates a comfortable atmosphere despite occasional rain.

September Temperature in Penang

In September, in Penang, the average temperature is 26°C (78°F), with maximums reaching 33°C (91°F) and minimums dipping to as low as 17°C (63°F). This moderate climate makes Penang an ideal destination for travelers seeking pleasant weather.

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

The chart illustrates September temperature patterns in Penang, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Penang, September typically has an average temperature of 26°C (78°F), with highs reaching up to 33°C (91°F) and lows dropping to around 17°C (63°F).

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

September Precipitation in Penang

In Penang in September, the precipitation amount is 11 mm (0.4 in) over the course of 3 days.

September Precipitation Trends in Penang

The chart displays monthly precipitation patterns in Penang, 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 Penang, September typically receives around 11 mm (0.4 inches) of precipitation spread over approximately 3 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 Penang

In Penang in September humidity is 70%. With an average temperature of 26°C (78°F), this humidity feels like a warm embrace, making outdoor activities slightly sticky and encouraging travelers to stay hydrated while exploring.

September Average Humidity in Penang

This chart illustrates the average monthly humidity levels in Penang, 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 Penang is approximately 70%, 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 Penang

In Penang 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 Penang.

Maximum UV Index Levels in Penang for September

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

Data source: Penang 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 Penang Compares to Other Months

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

This table compares monthly weather conditions in Penang, 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)	323 mm (12.7 inches)	78%	extreme
February Weather	26°C (78°F)	248 mm (9.8 inches)	84%	extreme
March Weather	26°C (79°F)	312 mm (12.3 inches)	84%	extreme
April Weather	26°C (78°F)	142 mm (5.6 inches)	82%	extreme
May Weather	26°C (78°F)	57 mm (2.2 inches)	83%	extreme
June Weather	25°C (77°F)	23 mm (0.9 inches)	79%	very high
July Weather	24°C (76°F)	12 mm (0.5 inches)	74%	extreme
August Weather	24°C (76°F)	13 mm (0.5 inches)	71%	extreme
September Weather	26°C (78°F)	11 mm (0.4 inches)	70%	extreme
October Weather	27°C (80°F)	43 mm (1.7 inches)	69%	extreme
November Weather	27°C (80°F)	193 mm (7.6 inches)	70%	extreme
December Weather	26°C (80°F)	279 mm (11.0 inches)	72%	extreme