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September Weather in Rantau, Indonesia

Last updated: August 23, 2025

In September, the average temperature in Rantau, Indonesia hovers around 26°C (80°F). Expect a comfortable minimum of 21°C (70°F) and the occasional maximum of 35°C (95°F). However, do prepare for some wet days, as the region receives an average precipitation of 167 mm (6.6 in) over 18 days, accompanied by a notable average humidity of 77%.

September Temperature in Rantau

In September in Rantau, the average temperature is 26°C (80°F). Maximums can reach 35°C (95°F), while minimums can drop to 21°C (70°F). This warm climate is ideal for travelers seeking sunny days and outdoor activities.

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

The chart illustrates September temperature patterns in Rantau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rantau, September typically has an average temperature of 26°C (80°F), with highs reaching up to 35°C (95°F) and lows dropping to around 21°C (70°F).
JanFebMarAprMayJunJulAugSepOctNovDec797979798079797979807979
Data source: Temperature data for Rantau 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 Rantau

In Rantau in September, the total precipitation amount is 167 mm (6.6 in) spread over 18 days.

September Precipitation Trends in Rantau

The chart displays monthly precipitation patterns in Rantau, 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 Rantau, September typically receives around 167 mm (6.6 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec236253340279255192131131167182317263
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rantau

In Rantau in September, humidity is 77%. With an average temperature of 26°C (80°F), this humidity feels like walking through a warm, damp blanket, making traveling somewhat uncomfortable and necessitating frequent breaks to stay hydrated and cool.

September Average Humidity in Rantau

This chart illustrates the average monthly humidity levels in Rantau, 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 Rantau is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%83%84%82%80%81%82%82%77%78%77%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rantau

In Rantau 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 Rantau.

Maximum UV Index Levels in Rantau for September

The chart shows the monthly maximum UV Index (UVI) for Rantau 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 Rantau typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151616151412121415151414
Data source: Rantau 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 Rantau Compares to Other Months

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

This table compares monthly weather conditions in Rantau, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)236 mm (9.3 inches)83%extreme
February Weather26°C (79°F)253 mm (10.0 inches)83%extreme
March Weather26°C (79°F)340 mm (13.4 inches)84%extreme
April Weather26°C (80°F)279 mm (11.0 inches)82%extreme
May Weather27°C (80°F)255 mm (10.0 inches)80%extreme
June Weather26°C (79°F)192 mm (7.5 inches)81%extreme
July Weather26°C (79°F)131 mm (5.1 inches)82%extreme
August Weather26°C (79°F)131 mm (5.2 inches)82%extreme
September Weather26°C (80°F)167 mm (6.6 inches)77%extreme
October Weather27°C (80°F)182 mm (7.1 inches)78%extreme
November Weather26°C (80°F)317 mm (12.5 inches)77%extreme
December Weather26°C (79°F)263 mm (10.3 inches)80%extreme

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