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September Weather in Siak Sri Indrapura, Indonesia

Last updated: August 23, 2025

In September, the average temperature in Siak Sri Indrapura, Indonesia is a warm 27°C (81°F), with minimums dipping to 23°C (73°F) and maximums peaking at 34°C (94°F). Visitors should be prepared for a humid environment, as the average humidity hovers around 89%. Expect substantial rainfall, with approximately 187 mm (7.4 in) accumulated over 25 days throughout the month.

September Temperature in Siak Sri Indrapura

In September in Siak Sri Indrapura, the average temperature is 27°C (81°F). The maximum can reach 34°C (94°F) and the minimum can be as low as 23°C (73°F). This pleasant climate makes it an ideal time for travel, offering warm days perfect for exploring and enjoying outdoor activities.

September Weather in Siak Sri Indrapura: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Siak Sri Indrapura, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siak Sri Indrapura, September typically has an average temperature of 27°C (81°F), with highs reaching up to 34°C (94°F) and lows dropping to around 23°C (73°F).
JanFebMarAprMayJunJulAugSepOctNovDec808181818281818181818080
Data source: Temperature data for Siak Sri Indrapura 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 Siak Sri Indrapura

In Siak Sri Indrapura in September, the total precipitation amount is 187 mm (7.4 in) spread over 25 days.

September Precipitation Trends in Siak Sri Indrapura

The chart displays monthly precipitation patterns in Siak Sri Indrapura, 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 Siak Sri Indrapura, September typically receives around 187 mm (7.4 inches) of precipitation spread over approximately 25 days.
JanFebMarAprMayJunJulAugSepOctNovDec150127247244223166116134187231329248
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Siak Sri Indrapura

In Siak Sri Indrapura in September humidity is 89%. With an average temperature of 27°C (81°F), this humidity feels like a wet blanket enveloping you, making outdoor activities challenging and travel a little less comfortable.

September Average Humidity in Siak Sri Indrapura

This chart illustrates the average monthly humidity levels in Siak Sri Indrapura, 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 Siak Sri Indrapura is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%81%82%84%87%88%88%90%89%90%90%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Siak Sri Indrapura

In Siak Sri Indrapura 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 Siak Sri Indrapura, you can check here.

Maximum UV Index Levels in Siak Sri Indrapura for September

The chart shows the monthly maximum UV Index (UVI) for Siak Sri Indrapura 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 Siak Sri Indrapura typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec131516151412121414141313
Data source: Siak Sri Indrapura 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 Siak Sri Indrapura Compares to Other Months

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

This table compares monthly weather conditions in Siak Sri Indrapura, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (81°F)149 mm (5.9 inches)87%extreme
February Weather27°C (81°F)127 mm (5.0 inches)81%extreme
March Weather27°C (81°F)247 mm (9.7 inches)82%extreme
April Weather27°C (82°F)244 mm (9.6 inches)84%extreme
May Weather28°C (82°F)223 mm (8.8 inches)87%extreme
June Weather27°C (82°F)166 mm (6.5 inches)88%extreme
July Weather27°C (82°F)116 mm (4.6 inches)88%extreme
August Weather27°C (82°F)134 mm (5.3 inches)90%extreme
September Weather27°C (81°F)187 mm (7.4 inches)89%extreme
October Weather27°C (81°F)231 mm (9.1 inches)90%extreme
November Weather27°C (81°F)329 mm (13.0 inches)90%extreme
December Weather27°C (81°F)248 mm (9.8 inches)89%extreme

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