The best times to visit Dumai for ideal weather are

late December

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

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Dumai Travel Guide

  • Safety
  • The busiest and least popular months
  • Overall travel experience by time of year
  • Weather in Dumai


    Average temperatures in Dumai vary barely at all and are too warm to be considered temperate for most. The area is in the bottom 1 percent of tourist destinations for pleasant weather. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Dumai, the hottest months are May, June, and then April. See average monthly temperatures below. The warmest time of year is generally early-to-mid-May where highs are regularly around 91.5°F (33.1°C) with temperatures rarely dropping below 75.9°F (24.4°C) at night.

    Dumai Temperatures (Fahrenheit)


    Dumai Temperatures (Celsius)


    “Feels-Like” Temperatures

    The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

    Dumai Perceived Temperature (F)


    Dumai Perceived Temperature (C)



    Average Dumai Temperatures by Month

    Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

    Show Fahrenheit

    Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
    Jan 88.7 80.3 73.5
    Feb 90.2 81.2 73.5
    Mar 90.3 81.6 74.6
    Apr 90.6 82.1 75.2
    May 91.1 82.7 75.6
    Jun 91.2 82.6 75.1
    Jul 90.3 81.7 74.5
    Aug 89.7 81.3 74.3
    Sep 89.5 81.2 74.5
    Oct 89.2 80.9 74.5
    Nov 88.5 80.4 74.4
    Dec 88.3 80.2 74.2

    Show Celsius

    Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
    Jan 31.5 26.8 23.1
    Feb 32.3 27.3 23.1
    Mar 32.4 27.6 23.7
    Apr 32.6 27.8 24
    May 32.8 28.2 24.2
    Jun 32.9 28.1 23.9
    Jul 32.4 27.6 23.6
    Aug 32.1 27.4 23.5
    Sep 31.9 27.3 23.6
    Oct 31.8 27.2 23.6
    Nov 31.4 26.9 23.6
    Dec 31.3 26.8 23.4

    Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

    Chance of Precipitation

    The graph below shows the % chance of rainy and snowy days in Dumai.

    Days with precipitation

    Snow on the Ground

    The graph below shows the average snow on the ground in Dumai (in).

    Snow depth

    Average Rain and Snow by Month

    Show Inches

    Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
    Jan 45.7 0 0.24
    Feb 28.6 0 0.1
    Mar 45.7 0 0.2
    Apr 51.4 0 0.15
    May 37.1 0 0.16
    Jun 31.4 0 0.12
    Jul 38.6 0 0.13
    Aug 47.1 0 0.22
    Sep 48.6 0 0.2
    Oct 57.1 0 0.35
    Nov 74.3 0 0.32
    Dec 58.6 0 0.22

    Show Centimeters

    Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
    Jan 45.7 0 0.61
    Feb 28.6 0 0.25
    Mar 45.7 0 0.51
    Apr 51.4 0 0.38
    May 37.1 0 0.41
    Jun 31.4 0 0.3
    Jul 38.6 0 0.33
    Aug 47.1 0 0.56
    Sep 48.6 0 0.51
    Oct 57.1 0 0.89
    Nov 74.3 0 0.81
    Dec 58.6 0 0.56


    Humidity and Wind

    Dumai has above average humidity compared to most tourist destinations. The least humid month is February (76.3% relative humidity), and the most humid month is November (83.5%).

    Wind in Dumai is usually calm. The windiest month is March, followed by April and February. March’s average wind speed of around 2.6 knots (3 MPH or 4.8 KPH) is considered “light air.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in mid-April where average top sustained speeds reach 7.7 knots, which is considered a gentle breeze.

    Relative Humidity (%)

    The graph below shows the average % humidity by month in Dumai.

    Avg. Relative Humidity


    The graph below shows wind speed (max and average) in knots.

    Max Sustained Wind
    Average Daily Wind

    Average Wind Speeds

    Show Wind Speeds

    All wind speeds are in knots.

    Month Avg. Wind Meaning (Beaufort) Avg. Maximum Sustained Wind Meaning (Beufort)
    Jan 2.2 light air 6.2 a light breeze
    Feb 2.5 light air 7.1 a gentle breeze
    Mar 2.6 light air 7.3 a light breeze
    Apr 2.6 light air 7.5 a gentle breeze
    May 2.4 light air 7 a light breeze
    Jun 2.4 light air 6.6 a light breeze
    Jul 2.4 light air 6.8 a light breeze
    Aug 2.4 light air 7 a gentle breeze
    Sep 2.4 light air 6.8 a light breeze
    Oct 2.4 light air 6.9 a light breeze
    Nov 2.2 light air 6.7 a light breeze
    Dec 2.1 light air 6 a light breeze

    Show Relative Humidity by Month

    Month Avg. Relative Humidity
    Jan 79.7
    Feb 76.3
    Mar 78.2
    Apr 79.1
    May 78.8
    Jun 77.9
    Jul 78.1
    Aug 79.1
    Sep 79.5
    Oct 80.7
    Nov 83.5
    Dec 82.5


    Is it Safe to Travel to Dumai?

    As of 6/27/2017 there are travel warnings and regional advisories for Indonesia; exercise a high degree of caution and avoid some areas. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories.

    Overall Dumai Travel Experience by Season

    Spring (March through May)

    Humidity and temperatures combine to make this season feel very warm. Highs range from 91.5°F (33.1°C) and 90.2°F (32.3°C) with warmer temperatures in the later months. Spring is slow/unreported for tourism, which makes it a good time for those looking for deals.

    Summer (June through August)

    The middle-year months have hot weather with high temperatures that are quite warm. June – August is slow/unreported season for tourism in Dumai, so lodging and other accommodations may cost as much as usual.

    Fall (September through November)

    Fall daily highs range from 89.9°F (32.2°C) and 88.3°F (31.3°C), which will feel warmer than comfortable given the humidity and wind. Tourism is slow/unreported during these months due to the weather, so hotels may be normally priced.

    Winter (December through February)

    Weather is perfect this time of year in Dumai to be enjoyable for warm weather travelers. The average high during this season is between 90.6°F (32.6°C) and 87.8°F (31°C). These times of year are slow/unreported with tourists.


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