Dumai Temperatures: Monthly Averages and Year-Round Insights

On this page, we’ll explore Dumai’s temperature statistics in detail, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in Indonesia.

Monthly Temperature Averages

The temperature in Dumai remains steady throughout the year, providing a consistently very warm climate. On average, maximum daytime temperatures range from a very warm 34°C in May to a very warm 32°C in September. Nighttime temperatures can drop, with averages reaching 24°C in September.

The chart below illustrates the average maximum day and minimum night temperatures in Dumai by month:

The lowest temperatures typically occur between 4 AM and 6 AM, while the peak temperatures are generally observed around 3 PM, when the sun's heating is most intense.

The chart below shows the average temperature throughout the year:

September, the city’s coldest month, sees about 266 mm of rainfall spread over roughly 17 days.

Annual Temperatures in Indonesia Compared

The map below shows the annual temperature across Indonesia. You can also select the different months in case you are interested in a specific month.

Annual

Annual

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Legend

very warm

warm

pleasant

moderate

cold

very cold

Very warm means maximum temperatures above 32°C. Warm: 25°C to 32°C. Pleasant: 18°C to 25°C Moderate: 10°C to 18°C. Cold: 5°C to 10°C. Very cold: lower than 5°C

Dumai Temperatures Compared World Wide

Dumai’s average annual maximum temperature is 33°C. Let’s compare this with some popular tourist destinations:

Seville, Spain, stands out with its warm Mediterranean climate and an average annual temperature of 23°C.

Meanwhile, Queenstown, New Zealand, the average annual temperature is significantly lower at 10°C, with mild summers and cold winters.

In Shanghai, China, the annual average temperature is 21°C, offering warm summers and mild winters.

Perth, Australia, experiences a Mediterranean climate, with a pleasant average temperature of 25°C.

How are these Temperatures Measured?

Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.

This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.

Temperatures in the Mountains

Although not all regions have mountains, elevated areas exhibit distinct temperature variations.

Sun Exposure: Sunlit slopes tend to be warmer, while shaded areas remain cooler.
Altitude Effects: Temperatures drop by approximately 6°C for every 1,000 meters of elevation, creating distinct microclimates.

For more detailed information about Dumai’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Dumai climate page.