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September Weather in Kotabaru, Indonesia

Last updated: August 23, 2025

In September, the average temperature in Kotabaru, Indonesia is around 27°C (80°F). You can expect minimums of 21°C (71°F) and maximums soaring to 35°C (96°F). With a precipitation total of 254 mm (10.0 in) spread over 24 days, the air tends to be quite humid, averaging at a stickiness of 88%. So, pack your umbrellas and light clothing for a warm, wet adventure!

September Temperature in Kotabaru

In September in Kotabaru, the average temperature is 27°C (80°F). Maximums can reach 35°C (96°F) and minimums can be as low as 21°C (71°F). This pleasant climate makes Kotabaru an ideal destination for travelers seeking warm and enjoyable 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 35°C (96°F) and lows dropping to around 21°C (71°F).
JanFebMarAprMayJunJulAugSepOctNovDec797980808080808080797979
Data source: Temperature data for Kotabaru 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 Kotabaru

In Kotabaru in September, the precipitation amount is 254 mm (10.0 in) during 24 days, indicating a significant amount of rainfall for that period.

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 254 mm (10.0 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec196215336344308201176163254332397310
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kotabaru

In Kotabaru in September, humidity is 88%. With an average temperature of 27°C (80°F), this humidity feels like a warm, thick blanket enveloping you, making travel quite uncomfortable as you navigate the sticky air and sweat almost immediately.

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 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%85%84%83%86%86%86%88%88%90%89%88%
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 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 Kotabaru, you can check here.

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 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141516151412121414151414
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.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)196 mm (7.7 inches)89%extreme
February Weather26°C (79°F)215 mm (8.5 inches)84%extreme
March Weather26°C (80°F)336 mm (13.2 inches)84%extreme
April Weather27°C (80°F)344 mm (13.5 inches)83%extreme
May Weather27°C (81°F)308 mm (12.1 inches)85%extreme
June Weather27°C (80°F)201 mm (7.9 inches)86%extreme
July Weather26°C (80°F)175 mm (6.9 inches)86%extreme
August Weather27°C (80°F)163 mm (6.4 inches)88%extreme
September Weather27°C (80°F)254 mm (10.0 inches)88%extreme
October Weather26°C (80°F)332 mm (13.1 inches)90%extreme
November Weather26°C (80°F)397 mm (15.6 inches)89%extreme
December Weather26°C (79°F)310 mm (12.2 inches)88%extreme

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