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September Weather in Wamena, Indonesia

Last updated: August 23, 2025

In Wamena, Indonesia, the average temperature in September hovers around 16°C (60°F). Residents can expect a minimum temperature of 9°C (49°F), while the mercury can rise to a comfortable 23°C (73°F). However, prepare for the wet season, with an average precipitation of 287 mm (11.3 in) spread over 28 days, resulting in a high average humidity of 91%.

September Temperature in Wamena

In September in Wamena, the average temperature is 16°C (60°F), with maximums reaching 23°C (73°F) and minimums dropping as low as 9°C (49°F). It's a perfect time for travelers to enjoy mild weather and outdoor activities.

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

The chart illustrates September temperature patterns in Wamena, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wamena, September typically has an average temperature of 16°C (60°F), with highs reaching up to 23°C (73°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec616161616160596060616162
Data source: Temperature data for Wamena 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 Wamena

In Wamena in September, the total precipitation amount is 287 mm (11.3 in) over a period of 28 days.

September Precipitation Trends in Wamena

The chart displays monthly precipitation patterns in Wamena, 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 Wamena, September typically receives around 287 mm (11.3 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec330390489395244239252284287315321418
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Wamena

In Wamena in September, humidity is 91%. With an average temperature of 16°C (60°F), this humidity feels like you're walking through a warm, damp mist, making travel quite uncomfortable and sticky as you navigate the bustling streets.

September Average Humidity in Wamena

This chart illustrates the average monthly humidity levels in Wamena, 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 Wamena is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%90%90%90%92%92%92%91%90%90%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Wamena

In Wamena in September, the maximum UV index reaches an alarming 17, which falls under the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to stay protected. For more details on the hourly UV index in Wamena, you can check Hourly UV Index in Wamena.

Maximum UV Index Levels in Wamena for September

The chart shows the monthly maximum UV Index (UVI) for Wamena 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 Wamena typically reaches 17, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec181919181513131517171616
Data source: Wamena 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 Wamena Compares to Other Months

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

This table compares monthly weather conditions in Wamena, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (62°F)330 mm (13.0 inches)90%extreme
February Weather16°C (61°F)390 mm (15.4 inches)90%extreme
March Weather16°C (62°F)489 mm (19.3 inches)90%extreme
April Weather16°C (62°F)394 mm (15.5 inches)90%extreme
May Weather16°C (62°F)244 mm (9.6 inches)90%extreme
June Weather16°C (60°F)239 mm (9.4 inches)92%extreme
July Weather15°C (60°F)252 mm (9.9 inches)92%extreme
August Weather15°C (60°F)284 mm (11.2 inches)92%extreme
September Weather16°C (60°F)287 mm (11.3 inches)91%extreme
October Weather16°C (61°F)315 mm (12.4 inches)90%extreme
November Weather16°C (61°F)321 mm (12.6 inches)90%extreme
December Weather17°C (62°F)418 mm (16.4 inches)90%extreme

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