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September Weather in Sintang, Indonesia

Last updated: August 23, 2025

In Sintang, Indonesia, the average temperature in September hovers around 27°C (81°F), with daytime highs reaching up to 35°C (95°F) and cooling down to a minimum of 22°C (71°F). Travelers should be prepared for a tropical climate, as precipitation averages 248 mm (9.8 in) over about 22 days, contributing to a notably high humidity of 84%. Ideal for those who appreciate vibrant rain-soaked experiences!

September Temperature in Sintang

In September in Sintang, the average temperature is 27°C (81°F). The maximum can reach 35°C (95°F), while the minimum can be as low as 22°C (71°F). This climate makes Sintang an ideal destination for travelers seeking warm and pleasant weather.

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

The chart illustrates September temperature patterns in Sintang, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sintang, September typically has an average temperature of 27°C (81°F), with highs reaching up to 35°C (95°F) and lows dropping to around 22°C (71°F).
JanFebMarAprMayJunJulAugSepOctNovDec808081818281818181818080
Data source: Temperature data for Sintang 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 Sintang

In Sintang in September, the total precipitation amount is 248 mm (9.8 in) spread over 22 days.

September Precipitation Trends in Sintang

The chart displays monthly precipitation patterns in Sintang, 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 Sintang, September typically receives around 248 mm (9.8 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec198242287257248240170204248344365257
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sintang

In Sintang in September humidity is 84%. With an average temperature of 27°C (81°F), this humidity feels like walking through a warm, moist blanket, making travel uncomfortable and sticky, as every step seems to weigh you down with the heavy air.

September Average Humidity in Sintang

This chart illustrates the average monthly humidity levels in Sintang, 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 Sintang is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%90%89%88%88%88%90%84%89%88%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sintang

In Sintang 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 Sintang.

Maximum UV Index Levels in Sintang for September

The chart shows the monthly maximum UV Index (UVI) for Sintang 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 Sintang typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141616151412121415151413
Data source: Sintang 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 Sintang Compares to Other Months

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

This table compares monthly weather conditions in Sintang, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (80°F)198 mm (7.8 inches)90%extreme
February Weather27°C (80°F)242 mm (9.5 inches)90%extreme
March Weather27°C (81°F)287 mm (11.3 inches)90%extreme
April Weather27°C (81°F)257 mm (10.1 inches)89%extreme
May Weather28°C (82°F)248 mm (9.8 inches)88%extreme
June Weather27°C (81°F)240 mm (9.5 inches)88%extreme
July Weather27°C (81°F)170 mm (6.7 inches)88%extreme
August Weather27°C (81°F)204 mm (8.0 inches)89%extreme
September Weather27°C (81°F)248 mm (9.8 inches)84%extreme
October Weather27°C (81°F)344 mm (13.5 inches)89%extreme
November Weather27°C (81°F)365 mm (14.4 inches)88%extreme
December Weather27°C (81°F)256 mm (10.1 inches)89%extreme

Compare Sintang's Climate with Cities Worldwide