September Weather in Ulu, Indonesia

Last updated: August 23, 2025

In September, the average temperature in Ulu, Indonesia hovers around 27°C (81°F), with a minimum of 25°C (78°F) and a maximum of 29°C (84°F). This month also brings 185 mm (7.3 in) of precipitation over approximately 19 days, contributing to an average humidity of 77%. Whether you're soaking up the sun or enjoying a refreshing rain, September in Ulu offers a unique and vibrant climate experience.

September Temperature in Ulu

In September, in Ulu, the average temperature is 27°C (81°F). The maximum can reach 29°C (84°F), while the minimum can drop to as low as 25°C (78°F). This mild and pleasant climate makes Ulu a perfect destination for travelers seeking warm and enjoyable weather.

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

The chart illustrates September temperature patterns in Ulu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ulu, September typically has an average temperature of 27°C (81°F), with highs reaching up to 29°C (84°F) and lows dropping to around 25°C (78°F).

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

September Precipitation in Ulu

In Ulu in September, the precipitation amount is 185 mm (7.3 in) over a period of 19 days.

September Precipitation Trends in Ulu

The chart displays monthly precipitation patterns in Ulu, 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 Ulu, September typically receives around 185 mm (7.3 inches) of precipitation spread over approximately 19 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 Ulu

In Ulu in September, humidity is 77%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket, making travel feel sticky and heavy, as sweat clings to the skin and the air becomes thick, causing you to long for refreshing breezes and cool shade.

September Average Humidity in Ulu

This chart illustrates the average monthly humidity levels in Ulu, 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 Ulu is approximately 77%, 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 Ulu

In Ulu 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 Ulu, you can check here.

Maximum UV Index Levels in Ulu for September

The chart shows the monthly maximum UV Index (UVI) for Ulu 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 Ulu typically reaches 14, which falls under the extreme exposure category.

Data source: Ulu 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 Ulu Compares to Other Months

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

This table compares monthly weather conditions in Ulu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (81°F)	296 mm (11.7 inches)	78%	extreme
February Weather	27°C (81°F)	180 mm (7.1 inches)	83%	extreme
March Weather	27°C (81°F)	267 mm (10.5 inches)	82%	extreme
April Weather	27°C (81°F)	165 mm (6.5 inches)	80%	extreme
May Weather	28°C (82°F)	233 mm (9.2 inches)	74%	extreme
June Weather	27°C (81°F)	314 mm (12.4 inches)	74%	extreme
July Weather	27°C (81°F)	272 mm (10.7 inches)	75%	extreme
August Weather	27°C (81°F)	180 mm (7.1 inches)	76%	extreme
September Weather	27°C (81°F)	185 mm (7.3 inches)	77%	extreme
October Weather	27°C (82°F)	173 mm (6.8 inches)	75%	extreme
November Weather	27°C (81°F)	264 mm (10.4 inches)	74%	extreme
December Weather	27°C (81°F)	286 mm (11.3 inches)	75%	extreme