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September Weather in Muara Siau, Indonesia

Last updated: August 23, 2025

In September, the average temperature in Muara Siau, Indonesia is a pleasant 24°C (76°F), but it can range from a cool 18°C (64°F) to a warm 32°C (90°F). Expect 175 mm (6.9 in) of precipitation spread over 19 days, with humidity averaging around 84%. Pack accordingly to enjoy your trip to this vibrant destination!

September Temperature in Muara Siau

In September in Muara Siau, the average temperature is 24°C (76°F). Maximums can reach 32°C (90°F) and minimums can be as low as 18°C (64°F). This makes it an ideal time to explore the outdoors and enjoy various activities in Muara Siau.

September Weather in Muara Siau: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Muara Siau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Muara Siau, September typically has an average temperature of 24°C (76°F), with highs reaching up to 32°C (90°F) and lows dropping to around 18°C (64°F).
JanFebMarAprMayJunJulAugSepOctNovDec757576767676757575767675
Data source: Temperature data for Muara Siau 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 Muara Siau

In Muara Siau in September, the precipitation amount is 175 mm (6.9 in) spread over 19 days.

September Precipitation Trends in Muara Siau

The chart displays monthly precipitation patterns in Muara Siau, 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 Muara Siau, September typically receives around 175 mm (6.9 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec280337471399245189120137175298359355
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Muara Siau

In Muara Siau in September humidity is 84%. With an average temperature of 24°C (76°F), this humidity feels like a warm, damp embrace that can make outdoor activities feel sticky and uncomfortable, requiring frequent breaks in the shade and plenty of hydration for travelers.

September Average Humidity in Muara Siau

This chart illustrates the average monthly humidity levels in Muara Siau, 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 Muara Siau is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%81%79%80%78%78%79%82%84%85%84%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Muara Siau

In Muara Siau 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 Muara Siau.

Maximum UV Index Levels in Muara Siau for September

The chart shows the monthly maximum UV Index (UVI) for Muara Siau 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 Muara Siau typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151617161412131515151515
Data source: Muara Siau 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 Muara Siau Compares to Other Months

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

This table compares monthly weather conditions in Muara Siau, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (75°F)280 mm (11.0 inches)83%extreme
February Weather24°C (75°F)337 mm (13.3 inches)80%extreme
March Weather24°C (76°F)471 mm (18.5 inches)79%extreme
April Weather24°C (76°F)399 mm (15.7 inches)80%extreme
May Weather25°C (77°F)245 mm (9.6 inches)78%extreme
June Weather24°C (76°F)189 mm (7.4 inches)78%extreme
July Weather24°C (75°F)120 mm (4.7 inches)79%extreme
August Weather24°C (75°F)137 mm (5.4 inches)82%extreme
September Weather24°C (76°F)175 mm (6.9 inches)84%extreme
October Weather24°C (76°F)298 mm (11.7 inches)85%extreme
November Weather24°C (76°F)358 mm (14.1 inches)84%extreme
December Weather24°C (76°F)355 mm (14.0 inches)83%extreme

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