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August Weather in Dumai, Indonesia

Last updated: August 23, 2025

In Dumai, Indonesia, the average temperature in August reaches a warm 28°C (82°F), with minimums dipping to 23°C (73°F) and soaring to a maximum of 35°C (95°F). Expect 173 mm (6.8 in) of precipitation over 21 days, contributing to an average humidity of 90% that adds a touch of tropical ambiance to your stay.

August Temperature in Dumai

In August in Dumai, the average temperature is 28°C (82°F). Maximums can reach 35°C (95°F) and minimums can be as low as 23°C (73°F). This warm and pleasant weather makes Dumai an ideal destination for outdoor activities and relaxation during your travels.

August Weather in Dumai: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Dumai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dumai, August typically has an average temperature of 28°C (82°F), with highs reaching up to 35°C (95°F) and lows dropping to around 23°C (73°F).
JanFebMarAprMayJunJulAugSepOctNovDec818282828382828281828181
Data source: Temperature data for Dumai 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.

August Precipitation in Dumai

In Dumai in August, the precipitation amount is 173 mm (6.8 in) over the course of 21 days.

August Precipitation Trends in Dumai

The chart displays monthly precipitation patterns in Dumai, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Dumai, August typically receives around 173 mm (6.8 inches) of precipitation spread over approximately 21 days.
JanFebMarAprMayJunJulAugSepOctNovDec18495226257252153145173264285381295
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Dumai

In Dumai in August, humidity is 90%. With an average temperature of 28°C (82°F), this humidity feels like a heavy blanket enveloping you, making travel feel stifling and exhausting, as each step feels laborious and sweat clings to your skin.

August Average Humidity in Dumai

This chart illustrates the average monthly humidity levels in Dumai, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Dumai is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%81%82%84%87%88%88%90%89%90%90%90%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Dumai

In Dumai in August, 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 Dumai, you can check here.

Maximum UV Index Levels in Dumai for August

The chart shows the monthly maximum UV Index (UVI) for Dumai in August, 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 August, the maximum UV index in Dumai typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec131516151412121414141313
Data source: Dumai August 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 August Weather in Dumai Compares to Other Months

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

This table compares monthly weather conditions in Dumai, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (82°F)184 mm (7.3 inches)87%extreme
February Weather28°C (82°F)95 mm (3.7 inches)81%extreme
March Weather28°C (83°F)226 mm (8.9 inches)82%extreme
April Weather28°C (83°F)257 mm (10.1 inches)84%extreme
May Weather28°C (83°F)252 mm (9.9 inches)87%extreme
June Weather28°C (83°F)153 mm (6.0 inches)88%extreme
July Weather28°C (82°F)145 mm (5.7 inches)88%extreme
August Weather28°C (82°F)173 mm (6.8 inches)90%extreme
September Weather27°C (82°F)264 mm (10.4 inches)89%extreme
October Weather28°C (82°F)285 mm (11.2 inches)90%extreme
November Weather27°C (81°F)381 mm (15.0 inches)90%extreme
December Weather27°C (82°F)295 mm (11.6 inches)89%extreme

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