Hot
Average highs reach 32°C, so days can feel very hot.
Weather Guide
Dumai, Indonesia Average Monthly Weather
Weather score60Good annual avg
Best months: February, July, June
Across the year, average daytime temperatures are around 32°C, sunshine averages 6.3h per day, and rainfall totals about 2260mm. Sea temperatures average 30°C across the year.
Annual weather
Annual averages
Temp
32°C
Rain
2260mm
Annual total
Sun
6.3h
Sea
30°C
Weather score
60
Good avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 181mm, so showers are a real planning factor.
Some sun
Sunshine averages 6.4h per day, enough for a balanced month.
Warm sea
Sea temperatures average 30°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Dumai, Indonesia with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August32°C average high
August is close to Dumai's usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
August181mm average rain
August sits near Dumai's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to February and May to July
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August6.4 hours average sun
August sits close to Dumai's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsFebruary to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August30°C average sea
August is close to Dumai's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaMarch to November
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
August61 weather score
August scores above Dumai's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJanuary to August
These months have the strongest weather score in the monthly averages.