September Weather in Kotabaru, Indonesia

Last updated: August 23, 2025

In September, the average temperature in Kotabaru, Indonesia is a warm 27°C (80°F), with a comfortable range between a minimum of 20°C (69°F) and a maximum of 32°C (89°F). Expect 7 mm (0.3 in) of precipitation over about 2 days, and enjoy an average humidity level of 70% that adds to the tropical ambiance.

September Temperature in Kotabaru

In September in Kotabaru, the average temperature is 27°C (80°F). Maximum temperatures can reach 32°C (89°F), while the minimum can drop to as low as 20°C (69°F). This climate makes Kotabaru an ideal destination for travelers seeking warm and pleasant weather.

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

The chart illustrates September temperature patterns in Kotabaru, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kotabaru, September typically has an average temperature of 27°C (80°F), with highs reaching up to 32°C (89°F) and lows dropping to around 20°C (69°F).

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

September Precipitation in Kotabaru

In Kotabaru in September, the precipitation amount is 7 mm (0.3 in) over a period of 2 days.

September Precipitation Trends in Kotabaru

The chart displays monthly precipitation patterns in Kotabaru, 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 Kotabaru, September typically receives around 7 mm (0.3 inches) of precipitation spread over approximately 2 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 Kotabaru

In Kotabaru in September humidity is 70%. With an average temperature of 27°C (80°F), this humidity feels like you're enveloped in a warm, heavy blanket, making traveling feel a bit more challenging. The air tends to weigh you down, and you may find yourself needing to take frequent breaks to stay refreshed.

September Average Humidity in Kotabaru

This chart illustrates the average monthly humidity levels in Kotabaru, 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 Kotabaru is approximately 70%, 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 Kotabaru

In Kotabaru 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 Kotabaru.

Maximum UV Index Levels in Kotabaru for September

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

Data source: Kotabaru 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 Kotabaru Compares to Other Months

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

This table compares monthly weather conditions in Kotabaru, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (80°F)	310 mm (12.2 inches)	78%	extreme
February Weather	26°C (79°F)	319 mm (12.6 inches)	84%	extreme
March Weather	26°C (80°F)	331 mm (13.0 inches)	84%	extreme
April Weather	27°C (81°F)	146 mm (5.7 inches)	82%	extreme
May Weather	27°C (81°F)	73 mm (2.9 inches)	83%	extreme
June Weather	26°C (79°F)	23 mm (0.9 inches)	79%	extreme
July Weather	26°C (79°F)	9 mm (0.4 inches)	74%	extreme
August Weather	26°C (79°F)	6 mm (0.2 inches)	71%	extreme
September Weather	27°C (80°F)	7 mm (0.3 inches)	70%	extreme
October Weather	27°C (82°F)	39 mm (1.5 inches)	69%	extreme
November Weather	27°C (82°F)	197 mm (7.8 inches)	70%	extreme
December Weather	27°C (81°F)	331 mm (13.0 inches)	72%	extreme