September Weather in Passo, Indonesia

Last updated: August 23, 2025

In September, the average temperature in Passo, Indonesia hovers around 26°C (79°F), offering a comfortably warm atmosphere. Temperatures can dip to a minimum of 24°C (75°F) and reach a maximum of 28°C (82°F). However, be prepared for some rain, as the region experiences about 130 mm (5.1 in) of precipitation over 21 days, coupled with an average humidity of 81%, creating a tropical feel throughout the month.

September Temperature in Passo

In September in Passo, the average temperature is 26°C (79°F). Maximums can reach 28°C (82°F), while minimums can drop to as low as 24°C (75°F). This mild and pleasant weather makes it an ideal destination for travelers seeking a comfortable climate.

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

The chart illustrates September temperature patterns in Passo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Passo, September typically has an average temperature of 26°C (79°F), with highs reaching up to 28°C (82°F) and lows dropping to around 24°C (75°F).

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

September Precipitation in Passo

In Passo in September, the precipitation amount reaches 130 mm (5.1 in) over the course of 21 days.

September Precipitation Trends in Passo

The chart displays monthly precipitation patterns in Passo, 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 Passo, September typically receives around 130 mm (5.1 inches) of precipitation spread over approximately 21 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 Passo

In Passo in September, humidity is 81%. With an average temperature of 26°C (79°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor adventures stickier and more draining, yet still vibrant with life—perfect for exploring local culture, but you'll want to take frequent breaks and stay hydrated.

September Average Humidity in Passo

This chart illustrates the average monthly humidity levels in Passo, 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 Passo is approximately 81%, 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 Passo

In Passo 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 Passo.

Maximum UV Index Levels in Passo for September

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

Data source: Passo 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 Passo Compares to Other Months

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

This table compares monthly weather conditions in Passo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	28°C (82°F)	146 mm (5.7 inches)	78%	extreme
February Weather	28°C (82°F)	133 mm (5.2 inches)	81%	extreme
March Weather	27°C (82°F)	217 mm (8.5 inches)	80%	extreme
April Weather	27°C (81°F)	229 mm (9.0 inches)	81%	extreme
May Weather	27°C (81°F)	310 mm (12.2 inches)	77%	extreme
June Weather	26°C (79°F)	293 mm (11.5 inches)	80%	extreme
July Weather	26°C (78°F)	260 mm (10.2 inches)	84%	extreme
August Weather	26°C (78°F)	121 mm (4.8 inches)	85%	extreme
September Weather	26°C (79°F)	130 mm (5.1 inches)	81%	extreme
October Weather	27°C (80°F)	88 mm (3.5 inches)	80%	extreme
November Weather	27°C (82°F)	106 mm (4.2 inches)	78%	extreme
December Weather	28°C (82°F)	168 mm (6.6 inches)	77%	extreme