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September Weather in Serui, Indonesia

Last updated: August 23, 2025

In September, the average temperature in Serui, Indonesia is a warm 27°C (81°F). Expect a comfortable range with minimums of 25°C (77°F) and maximums peaking at 30°C (86°F). However, prepare for a fairly wet month, with an average precipitation of 317 mm (12.5 in) spread across 28 days, and keep in mind the high humidity level at 89%.

September Temperature in Serui

In September in Serui, the average temperature is 27°C (81°F). The maximum can reach 30°C (86°F) and the minimum can be as low as 25°C (77°F). It's a perfect time to visit Serui for warm and pleasant weather!

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

The chart illustrates September temperature patterns in Serui, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Serui, September typically has an average temperature of 27°C (81°F), with highs reaching up to 30°C (86°F) and lows dropping to around 25°C (77°F).
JanFebMarAprMayJunJulAugSepOctNovDec818181818180808080818181
Data source: Temperature data for Serui 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 Serui

In Serui in September, the total precipitation amount is 317 mm (12.5 in), accumulated over the course of 28 days.

September Precipitation Trends in Serui

The chart displays monthly precipitation patterns in Serui, 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 Serui, September typically receives around 317 mm (12.5 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec232309357346324338303310317298258338
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Serui

In Serui 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 Serui

This chart illustrates the average monthly humidity levels in Serui, 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 Serui is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%89%88%89%88%89%88%90%89%89%89%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Serui

In Serui 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 Serui.

Maximum UV Index Levels in Serui for September

The chart shows the monthly maximum UV Index (UVI) for Serui 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 Serui typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151617161412121415151414
Data source: Serui 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 Serui Compares to Other Months

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

This table compares monthly weather conditions in Serui, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (81°F)232 mm (9.1 inches)88%extreme
February Weather27°C (81°F)309 mm (12.2 inches)89%extreme
March Weather27°C (81°F)357 mm (14.1 inches)88%extreme
April Weather27°C (81°F)346 mm (13.6 inches)89%extreme
May Weather27°C (81°F)324 mm (12.7 inches)88%extreme
June Weather27°C (81°F)338 mm (13.3 inches)89%extreme
July Weather27°C (80°F)303 mm (11.9 inches)88%extreme
August Weather27°C (80°F)310 mm (12.2 inches)90%extreme
September Weather27°C (81°F)317 mm (12.5 inches)89%extreme
October Weather27°C (81°F)298 mm (11.7 inches)89%extreme
November Weather27°C (82°F)258 mm (10.2 inches)89%extreme
December Weather27°C (82°F)338 mm (13.3 inches)89%extreme

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