Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
December verdict
Dumai, Indonesia in December
Weather score57Good
Good for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 5.5h per day, enough for a balanced month. Rainfall averages 204mm, so showers are a real planning factor.
December weather
Monthly averages
Temp
31°C
Rain
204mm
Sun
5.5h
Sea
29°C
Weather score
57
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 204mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.5h per day, enough for a balanced month.
Warm sea
Sea temperatures average 29°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
December31°C average high
December 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
December204mm average rain
December 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
December5.5 hours average sun
December is one of Dumai's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsFebruary to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December29°C average sea
December is below Dumai's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaMarch to November
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
December57 weather score
December scores below Dumai's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJanuary to August
These months have the strongest weather score in the monthly averages.